feat: add tzdata-legacy slices

In 24.04, the tzdata package was split into tzdata, tzdata-icu, and
tzdata-legacy. The tzdata package ships only timezones that follow the
current rules of geographical region (continent or ocean) and city name.
All legacy timezone symlinks (old or merged timezones mentioned in the
upstream backward file) were moved to tzdata-legacy. This includes the
US/* timezones. [1]

This commit adds the slice definitions for tzdata-legacy to provide the
legacy timezones.

It also changes the tzdata slice definitions to include explicit paths
instead of globs to avoid conflicting paths across tzdata and
tzdata-legacy slices.

References:
- [1] https://discourse.ubuntu.com/t/ubuntu-24-04-lts-noble-numbat-release-notes/39890#p-99950-tzdata-package-split

Resolves canonical#405.

slices/tzdata-legacy.yaml

@@ -0,0 +1,265 @@
+package: tzdata-legacy
+
+essential:
+  - tzdata-legacy_copyright
+
+slices:
+  # The "base" slice contains Canonical timezone abbreviations. These are
+  # primary, preferred zone names that are often used as abbreviations for
+  # location-specific timezones across the globe. Example: Europe/Sofia observes
+  # EET.
+  base:
+    essential:
+      - tzdata_base
+    contents:
+      /usr/share/zoneinfo/right/CET:
+      /usr/share/zoneinfo/right/CST6CDT:
+      /usr/share/zoneinfo/right/EET:
+      /usr/share/zoneinfo/right/EST:
+      /usr/share/zoneinfo/right/EST5EDT:
+      /usr/share/zoneinfo/right/Factory:
+      /usr/share/zoneinfo/right/HST:
+      /usr/share/zoneinfo/right/MET:
+      /usr/share/zoneinfo/right/MST:
+      /usr/share/zoneinfo/right/MST7MDT:
+      /usr/share/zoneinfo/right/PST8PDT:
+      /usr/share/zoneinfo/right/WET:
+
+  africa:
+    essential:
+      - tzdata_africa
+    contents:
+      /usr/share/zoneinfo/Africa/Asmera:
+      /usr/share/zoneinfo/Egypt:
+      /usr/share/zoneinfo/Libya:
+      /usr/share/zoneinfo/right/Africa/**:
+      /usr/share/zoneinfo/right/Egypt:
+      /usr/share/zoneinfo/right/Libya:
+
+  america:
+    essential:
+      - tzdata_america
+    contents:
+      /usr/share/zoneinfo/America/Argentina/ComodRivadavia:
+      /usr/share/zoneinfo/America/Buenos_Aires:
+      /usr/share/zoneinfo/America/Catamarca:
+      /usr/share/zoneinfo/America/Cordoba:
+      /usr/share/zoneinfo/America/Fort_Wayne:
+      /usr/share/zoneinfo/America/Godthab:
+      /usr/share/zoneinfo/America/Indianapolis:
+      /usr/share/zoneinfo/America/Jujuy:
+      /usr/share/zoneinfo/America/Knox_IN:
+      /usr/share/zoneinfo/America/Louisville:
+      /usr/share/zoneinfo/America/Mendoza:
+      /usr/share/zoneinfo/America/Rosario:
+      /usr/share/zoneinfo/Cuba:
+      /usr/share/zoneinfo/Jamaica:
+      /usr/share/zoneinfo/Navajo:
+      /usr/share/zoneinfo/right/America/**:
+      /usr/share/zoneinfo/right/Cuba:
+      /usr/share/zoneinfo/right/Jamaica:
+      /usr/share/zoneinfo/right/Navajo:
+
+  antarctica:
+    essential:
+      - tzdata_antarctica
+    contents:
+      /usr/share/zoneinfo/Antarctica/South_Pole:
+      /usr/share/zoneinfo/right/Antarctica/**:
+
+  arctic:
+    essential:
+      - tzdata-legacy_eurasia
+      - tzdata_arctic
+    contents:
+      /usr/share/zoneinfo/right/Arctic/*:
+
+  atlantic:
+    essential:
+      - tzdata_atlantic
+    contents:
+      /usr/share/zoneinfo/Atlantic/Faeroe:
+      /usr/share/zoneinfo/right/Atlantic/**:
+
+  australia:
+    essential:
+      - tzdata_australia
+    contents:
+      /usr/share/zoneinfo/Australia/ACT:
+      /usr/share/zoneinfo/Australia/LHI:
+      /usr/share/zoneinfo/Australia/NSW:
+      /usr/share/zoneinfo/Australia/North:
+      /usr/share/zoneinfo/Australia/Queensland:
+      /usr/share/zoneinfo/Australia/South:
+      /usr/share/zoneinfo/Australia/Tasmania:
+      /usr/share/zoneinfo/Australia/Victoria:
+      /usr/share/zoneinfo/Australia/West:
+      /usr/share/zoneinfo/right/Australia/**:
+
+  # Some countries, although geographically belonging to a continent, are kept
+  # in their own slice since that is how they are structured in the tzdata deb.
+  brazil:
+    essential:
+      - tzdata-legacy_america
+    contents:
+      /usr/share/zoneinfo/Brazil/Acre:
+      /usr/share/zoneinfo/Brazil/DeNoronha:
+      /usr/share/zoneinfo/Brazil/East:
+      /usr/share/zoneinfo/Brazil/West:
+      /usr/share/zoneinfo/right/Brazil/**:
+
+  canada:
+    essential:
+      - tzdata-legacy_america
+    contents:
+      /usr/share/zoneinfo/Canada/**:
+      /usr/share/zoneinfo/right/Canada/**:
+
+  chile:
+    essential:
+      - tzdata-legacy_america
+      - tzdata-legacy_pacific
+    contents:
+      /usr/share/zoneinfo/Chile/**:
+      /usr/share/zoneinfo/right/Chile/**:
+
+  # "Etc" is meant to provide "timezones" that don't fit with the standard
+  # timezones.  As an example, UTC isn't actually a timezone, but a standard.
+  # Like Zulu and others, most of these can be used for time information, but
+  # derive from different domains (like the military). Same for others.
+  etc:
+    essential:
+      - tzdata_etc
+    contents:
+      /usr/share/zoneinfo/GMT+0:
+      /usr/share/zoneinfo/GMT-0:
+      /usr/share/zoneinfo/GMT0:
+      /usr/share/zoneinfo/Greenwich:
+      /usr/share/zoneinfo/UCT:
+      /usr/share/zoneinfo/Universal:
+      /usr/share/zoneinfo/Zulu:
+      /usr/share/zoneinfo/right/Etc/**:
+      /usr/share/zoneinfo/right/GMT:
+      /usr/share/zoneinfo/right/GMT+0:
+      /usr/share/zoneinfo/right/GMT-0:
+      /usr/share/zoneinfo/right/GMT0:
+      /usr/share/zoneinfo/right/Greenwich:
+      /usr/share/zoneinfo/right/UCT:
+      /usr/share/zoneinfo/right/UTC:
+      /usr/share/zoneinfo/right/Universal:
+      /usr/share/zoneinfo/right/Zulu:
+
+  eurasia:
+    essential:
+      - tzdata-legacy_atlantic
+      - tzdata_eurasia
+    contents:
+      /usr/share/zoneinfo/Asia/Ashkhabad:
+      /usr/share/zoneinfo/Asia/Calcutta:
+      /usr/share/zoneinfo/Asia/Chungking:
+      /usr/share/zoneinfo/Asia/Dacca:
+      /usr/share/zoneinfo/Asia/Katmandu:
+      /usr/share/zoneinfo/Asia/Macao:
+      /usr/share/zoneinfo/Asia/Rangoon:
+      /usr/share/zoneinfo/Asia/Saigon:
+      /usr/share/zoneinfo/Asia/Thimbu:
+      /usr/share/zoneinfo/Asia/Ujung_Pandang:
+      /usr/share/zoneinfo/Asia/Ulan_Bator:
+      /usr/share/zoneinfo/Eire:
+      /usr/share/zoneinfo/Europe/Kiev:
+      /usr/share/zoneinfo/Europe/Uzhgorod:
+      /usr/share/zoneinfo/Europe/Zaporozhye:
+      /usr/share/zoneinfo/GB-Eire:
+      /usr/share/zoneinfo/GB:
+      /usr/share/zoneinfo/Hongkong:
+      /usr/share/zoneinfo/Iceland:
+      /usr/share/zoneinfo/Iran:
+      /usr/share/zoneinfo/Israel:
+      /usr/share/zoneinfo/Japan:
+      /usr/share/zoneinfo/PRC:
+      /usr/share/zoneinfo/Poland:
+      /usr/share/zoneinfo/Portugal:
+      /usr/share/zoneinfo/ROC:
+      /usr/share/zoneinfo/ROK:
+      /usr/share/zoneinfo/Singapore:
+      /usr/share/zoneinfo/Turkey:
+      /usr/share/zoneinfo/W-SU:
+      /usr/share/zoneinfo/right/Asia/**:
+      /usr/share/zoneinfo/right/Eire:
+      /usr/share/zoneinfo/right/Europe/**:
+      /usr/share/zoneinfo/right/GB-Eire:
+      /usr/share/zoneinfo/right/GB:
+      /usr/share/zoneinfo/right/Hongkong:
+      /usr/share/zoneinfo/right/Iceland:
+      /usr/share/zoneinfo/right/Iran:
+      /usr/share/zoneinfo/right/Israel:
+      /usr/share/zoneinfo/right/Japan:
+      /usr/share/zoneinfo/right/PRC:
+      /usr/share/zoneinfo/right/Poland:
+      /usr/share/zoneinfo/right/Portugal:
+      /usr/share/zoneinfo/right/ROC:
+      /usr/share/zoneinfo/right/ROK:
+      /usr/share/zoneinfo/right/Singapore:
+      /usr/share/zoneinfo/right/Turkey:
+      /usr/share/zoneinfo/right/W-SU:
+
+  indian:
+    essential:
+      - tzdata_indian
+    contents:
+      /usr/share/zoneinfo/right/Indian/**:
+
+  mexico:
+    essential:
+      - tzdata-legacy_america
+    contents:
+      /usr/share/zoneinfo/Mexico/*:
+      /usr/share/zoneinfo/right/Mexico/*:
+
+  pacific:
+    essential:
+      - tzdata_pacific
+    contents:
+      /usr/share/zoneinfo/Kwajalein:
+      /usr/share/zoneinfo/NZ:
+      /usr/share/zoneinfo/NZ-CHAT:
+      /usr/share/zoneinfo/Pacific/Enderbury:
+      /usr/share/zoneinfo/Pacific/Ponape:
+      /usr/share/zoneinfo/Pacific/Truk:
+      /usr/share/zoneinfo/right/Kwajalein:
+      /usr/share/zoneinfo/right/NZ:
+      /usr/share/zoneinfo/right/NZ-CHAT:
+      /usr/share/zoneinfo/right/Pacific/**:
+
+  united-states:
+    essential:
+      - tzdata-legacy_america
+      - tzdata-legacy_pacific
+    contents:
+      /usr/share/zoneinfo/US/*:
+      /usr/share/zoneinfo/right/US/*:
+
+  # Install all timezones.
+  zoneinfo:
+    essential:
+      - tzdata-legacy_africa
+      - tzdata-legacy_america
+      - tzdata-legacy_antarctica
+      - tzdata-legacy_arctic
+      - tzdata-legacy_atlantic
+      - tzdata-legacy_australia
+      - tzdata-legacy_base
+      - tzdata-legacy_brazil
+      - tzdata-legacy_canada
+      - tzdata-legacy_chile
+      - tzdata-legacy_etc
+      - tzdata-legacy_eurasia
+      - tzdata-legacy_indian
+      - tzdata-legacy_mexico
+      - tzdata-legacy_pacific
+      - tzdata-legacy_united-states
+      - tzdata_zoneinfo
+
+  copyright:
+    contents:
+      /usr/share/doc/tzdata-legacy/copyright: