[CI] Extend metrics container to log BuildKite metrics

[Keenuts]

The current container focuses on Github metrics. Before deprecating BuildKite, we want to make sure the new infra quality is better, or at least the same.

Being able to compare buildkite metrics with github metrics on grafana will allow us to easily present the comparison.

This PR requires llvm/llvm-zorg#400 to be merged first.

[github-actions]

✅ With the latest revision this PR passed the Python code formatter.

[boomanaiden154]

Some comments, pretty much all just nits. This overall looks pretty good!

[boomanaiden154]

Overall LGTM.

Please wrap lines to 80 characters (or 88 given that's what Black prefers) given the LLVM coding standards.

[Keenuts]

Overall LGTM.

Please wrap lines to 80 characters (or 88 given that's what Black prefers) given the LLVM coding standards.

done (not strict 80, but around for visibility)

[Keenuts]

Turns out the issue I had was due to the way we kept track of the last visited workflow.
But It seems it was overly complex for no reason: the workflows are returned sorted, and we can even filter the 'completed' ones at the query level.
Meaning we only need to keep track of one workflow ID: the one we checked.
Logic is not similar to the buildkite version.

[boomanaiden154]

It looks like this now also contains changes from #130317? Is the plan to land that first and then rebase?

[Keenuts]

It looks like this now also contains changes from #130317? Is the plan to land that first and then rebase?

Yes, working on this I realized I needed to rework the github part first, so plan on landing the refactoring PR first, then rework this one to just add the buildkite part.