percona: update packages, init 8.4

[osnyx]

• updates LTS packages for percona-server and percona-xtrabackup in the 8.0 release series
• inits the 8.4 release series of percona-server and percona-xtrabackup
  • the 8.4 series is another LTS release, hence the percona-server_lts and percona-xtrabackup_lts now point towards these packages
  • the 8.3 innovation series is now end-of-life, thus the -innovation package names temporarily point to 8.4 as well, until the release of 8.5

I had to restructure the package naming again, partially undoing #309953:
When reworking the percona package naming towards the two release
streams "innovation" and "lts", I did not anticipate the case that two
releases are long-term supported in parallel, and that the latest
Innovation release is end-of-life and replaced by a more recent lts.

Hence, the first-level attribute names now reflect the package
major-minor versions again, augmented by attribute names pointing to
respective lts and innovation releases.

notes on backporting

I intend to manually backport this to release-24.05. The package-updates will be kept as-is, but the -lts names will continue to point to the 8.0 release series to avoid breaking changes within a release.
The backport is necessary, as 8.3 is end-of-life by now.

Changelogs:

• https://docs.percona.com/percona-xtrabackup/8.0/release-notes/8.0/8.0.35-31.0.html#release-highlights
• https://docs.percona.com/percona-xtrabackup/8.4/release-notes/8.4.0-1.html
• https://docs.percona.com/percona-server/8.0/release-notes/8.0.37-29.html
• https://docs.percona.com/percona-server/8.4/release-notes/8.4.0-1.html

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 24.11 Release Notes (or backporting 23.11 and 24.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

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[osnyx]

I can also offer to run this through our extended test suite that combines percona-server and xtrabackup invocations, but that might take a few days.

[osnyx]

I found a typo in a commit message and had to reword that commit. Code remains unchanged.

[osnyx]

Our internal extended test suite currently fails for percona-server_8_4, but this is likely cause by native password authentication now being disabled by default.
I added this change to the NixOS 24.11 release notes.

For percona-server_8_0 the test suite still passes.

[osnyx]

I can happily report that our extended test suite passes again after enabling legacy password auth again. So the packages are working fine.

[Ma27]

The changes are looking good and the packages build for me.

Two things however:

• Should we also update the list of percona packages in nixos/tests/mysql/common.nix to match our current naming scheme? I'd suggest to just do percona-server_8_0 and percona-server_8_4 there (and percona-server_8_5 when it gets out - or 9_0 or whatever the next one will be).
• Also, I have one request about the commits themselves: I see that you've renamed files in the commits and then changed the imports in another commit (the rework naming part). This has the downside that there are some commits where percona doesn't evaluate which has the potential of making bisects unnecessarily hard. Can you please make sure that if you rename a file in a commit, the import of the file also gets changed already?

[leona-ya]

Generally this seems to be the right move. Also because Percona won't release Innovation releases anymore for 9.x

[osnyx]

@Ma27 You're correct with your remarks on rebasing. My motivation was to lay out the commits in a way that makes backporting easier, but I guess I found another good commit scoping now.

[osnyx]

I fixed some small further nitpicks, also updated the designated backport. Please re-review.