CI: stop validating GHC 7 (backport #9886) (#9957) (#9957)

3.12 changelog fixup (#9922)

* Incorporate Brandon’s suggestions

See #9920.

* Incorporate Artem’s suggestions

See #9920.

* Do not repeat yourself

* Fix release notes grammar (#9924)

* Fix release notes grammar

See #9920.

* Fix whitespace

* Support GHC 9.12

(cherry picked from commit da6bdef)

* Fix changelog/readme (backport #9935) (#9936)

* Fix changelog/readme

(cherry picked from commit ea0f464)

* Remove previous release date

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Co-authored-by: Francesco Ariis <[email protected]>

* Tell zlib not to use pkg-config in GitLab CI.

(cherry picked from commit 62c74fe)

* Revert "Mark ForeignLibs test as broken with ghc-8.4.4"

This reverts commit a90d44f.

(cherry picked from commit d0a690b)

* CI: drop validation of GHC 7

Changes:
- bump GHC_FOR_RELEASE to 9.4.8
- bump action versions
- uniform quoting style
- satisfy actionlint
- fix order: setup Haskell before cache restore (uses setup.haskell-outputs)
- use `--ignore-project` in `cabal install hackage-repo-tool`
- use GHC_FOR_RELEASE also in validate-old-ghcs
- closes #8858: deleted comment
- closes #9858 by dropping container and using ghcup to setup ghcs

GHCs that do not install on ubuntu-22.04 with GHCup are dropped, meaning we only keep GHC 8.0.2 and up.

(cherry picked from commit 29dc53c)

# Conflicts:
#	.github/workflows/validate.yml

* fix validate.yml conflicts

How is this backport conflicting with _itself_?

* copy an import list from #9551

because `System.Process.Internals` just (like, within the past
hour or so) started exporting a name we are using.

* CI: force MacOS jobs to use Intel runners (macos-13) (backport #9949) (#9956)

* CI: force MacOS jobs to use Intel runners (`macos-13`)

GitHub just switched macos-latest to the ARM chips (now alisasing
`macos-14`), and it brings a bunch of problems.

- First of all, GHC's 8.8 and 8.6 don't exist there.
- ghcup and llvm are unavailable

For the time being, lets stay on the previous version of the runner.

(cherry picked from commit d36e0d0)

* CI: GitHub MacOS runners lost ghcup since 2024-04-27, so use haskell-action/setup instead

(cherry picked from commit 082d952)

* fixup! more compat with new macos runners

(cherry picked from commit 326a1f6)

* !fixup resolve conflicts

* copy an import list from #9551

because `System.Process.Internals` just (like, within the past
hour or so) started exporting a name we are using.

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Co-authored-by: Artem Pelenitsyn <[email protected]>
Co-authored-by: brandon s allbery kf8nh <[email protected]>

* Merge branch '3.12' into mergify/bp/3.12/pr-9886

* Update validate.yml

github nicely decided to ~revert~ the OS X validate fix when I rebased on top of it.

* make validate.yml consistent with master

Co-authored-by: Mikolaj <[email protected]>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Author: mergify[bot]