Meta-issue: Fix CI issues

[ufechner7]

1. Necessary bug fixes:

• Bug: Incompatibility with Julia 1.11-rc1 and 1.11-rc2 #951
  • Fixed by: Fix embedding_wrapper.c for Julia 1.11; also, run CI on 1.11, but skip the incremental=false tests on 1.11 #954
• Bug: macOS: System image file fails consistency check on binary startup #738 (and Fix CI failures on macOS #955)
  • Fixed by: Change naming convention of object files to follow what Base Julia does; also, start testing on macOS again (but only Intel macOS) #930
• Bug: Regression in Julia 1.11: Cannot create fresh base sysimage (incremental=false) containing Pkg #976
  • Fixed by: Do not put project stdlibs into the base (non-incremental) sysimage #987
• Bug: Regression in Julia 1.12: Creating fresh base sysimage (incremental=false) fails with error during bootstrap #989

Bugs only seen in CI:

• Intermittent (non-deterministic) bug seen only in CI: Non-deterministic Windows CI error: rmdir: Directory not empty #978

2. Resume or start testing on the following:

• Start testing on Julia 1.11
  • This PR starts testing on Julia 1.11, but importantly SKIPS the incremental=false tests on Julia 1.11: Fix embedding_wrapper.c for Julia 1.11; also, run CI on 1.11, but skip the incremental=false tests on 1.11 #954
  • TODO: restore the incremental=false tests on Julia 1.11.
    • Do not put project stdlibs into the base (non-incremental) sysimage #987 restores the incremental=false tests on Julia 1.11.
• Resume testing on Julia nightly.
  • CI: Run a single job on Julia nightly (but skip the incremental=false tests on Julia 1.12) #982
• Resume testing on Intel macOS.
  • Included in Change naming convention of object files to follow what Base Julia does; also, start testing on macOS again (but only Intel macOS) #930
• Resume testing 32-bit Julia on Windows.
  • Julia 1.6: CI: Resume testing 32-bit Julia on Windows for Julia 1.6 and 1.10, but keep 1.9 disabled for now #968
  • Julia 1.10: CI: Resume testing 32-bit Julia on Windows for Julia 1.6 and 1.10, but keep 1.9 disabled for now #968
  • Julia 1.11: TODO.
• Start testing on Apple Silicon macOS (runs-on: macos-14 on GitHub Actions).
  • Run macOS CI on both Intel and Apple Silicon #970

3. Stop testing on the following:

We have stopped testing on Julia 1.8.

We have stopped testing on Julia 1.9.

4. Other CI-related PRs and tasks:

• Fix CI, and temporarily disable some CI jobs, and use the HelloWorldC artifact (instead of the fooifier artifact) #965
• More CI tweaks, and temporarily disable some more CI jobs #966
• Consider moving CI to Buildkite? #846

5. Other tasks:

• Do not run old Julia versions on ARM, suppress failures with Julia nightly #956 was closed in favor of Run macOS CI on both Intel and Apple Silicon #970.
• Fix Fix CI failures on macOS #955

[DilumAluthge]

Okay, so currently CI is all green on PackageCompiler#master. For example: 85cdb03

There are quite a few CI tasks remaining, including re-enabling CI on several platforms, and un-skipping several currently-broken tests.

I've updated the list of tasks in the issue. Anything with an unchecked checkbox is still a TODO.

[DilumAluthge]

This is pretty much all done now. There are a few remaining tasks as listed above:

• Intermittent (non-deterministic) bug seen only in CI: Non-deterministic Windows CI error: rmdir: Directory not empty #978
• TODO: Resume testing 32-bit Julia on Windows on Julia 1.11

And then there is the broader question of whether we should move CI from GitHub Actions to Buildkite:

• Consider moving CI to Buildkite? #846

Pretty much everything else is done, so I think this meta-issue can be closed now.