Add TimeDelta::{MIN, MAX} const values #3441

Job	Run time
features_check (ubuntu-latest)	3m 57s
rust_versions (ubuntu-latest, stable)	1m 21s
rust_msrv (ubuntu-latest)	2m 36s
no_std (ubuntu-latest, thumbv6m-none-eabi)	35s
rust_versions (ubuntu-latest, beta)	1m 15s
timezones (ubuntu-latest, ACST-9:30)	1m 30s
rust_versions (ubuntu-latest, nightly)	1m 2s
no_std (ubuntu-latest, x86_64-fortanix-unknown-sgx)	39s
timezones (ubuntu-latest, EST4)	1m 51s
timezones (ubuntu-latest, UTC0)	1m 31s
alternative_targets (ubuntu-latest, wasm32-unknown-emscripten)	17s
timezones (ubuntu-latest, Asia/Katmandu)	1m 27s
check-docs	20s
timezones (macos-latest, ACST-9:30)	47s
alternative_targets (ubuntu-latest, aarch64-apple-ios)	16s
alternative_targets (ubuntu-latest, aarch64-linux-android)	21s
timezones (macos-latest, EST4)	41s
cross-targets (x86_64-unknown-illumos)	1m 8s
timezones (macos-latest, UTC0)	46s
cross-tests (ubuntu-latest)	2m 23s
test_wasi (ubuntu-latest, wasm32-wasi)	28s
test_wasm (ubuntu-latest)	33s
timezones (macos-latest, Asia/Katmandu)	45s
timezones (windows-latest, ACST-9:30)	3m 50s
timezones (windows-latest, EST4)	2m 53s
timezones (windows-latest, UTC0)	1m 51s
timezones (windows-latest, Asia/Katmandu)	1m 51s
	36m 54s

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