When downloading bazelisk/buildifier, we use curl, which still returns
exit code zero on HTTP 4xx errors unless we pass --fail. This patch adds
--fail flags so that error messages are more clear.

We don't need this anymore since all new contributors in the last year
have applied for commit access using GitHub issues. There is already
code in the script that removes anyone who submitted a request, so we
don't need the old code any more (which was way too conservitave and
very slow).

It doesn't look like these tests are actually run on Windows, so we
don't need it.

This is not needed now that we are using the container to run the
workflow.

This patch makes the metrics container build/push job use the common
container build/push actions to simplify the workflow by quite a bit.

To ensure we stay ahead of the ~6 month time horizon. This new version
seems to be mostly small version bumps and minor fixes that probably are
not too relevant to us.

This reverts commit d772663a9f003a08ee76414397963c58e80b27d7.

This fixes the final issue with the labeller landing. There were
two remaining issues:
1. There was an extra quote on one of the globs
2. Some of the yaml keys were named incorrectly (should have been
   plural)

ninja is already installed by default on Linux and macOS.

This reverts commit bd8c94177537ba30c6a160afa6dd1b8b8fc1e813.

This still broke things and evidently needs more testing on a fork
before relanding.

https://github.com/llvm/llvm-project/actions/runs/19475911086

This reverts commit b3d62645158cd6f463f2e1c878f6d63b9dc4b164.

This broke the workflow because the sync-labels flag was set to a
zero-length string to work around an issue. The underlying issue has
been fixed and the value is now required to be a boolean. We can just
drop the value because we want the default behavior anyways. This should
be the last remaining breaking change from v5 that we need to migrate.