[libcxx-commits] [libcxx] [llvm] [CI][Github] Add linux premerge workflow (PR #119635)

[Nathan Gauër via libcxx-commits]

Keenuts wrote:

> LG, seems like a straightforward translation from the BuildKite flow. What's the transition plan by the way: are there enough machines provisioned to land this? We'll run the two in parallel until you disconnect the buildkite linux flow right?

For now, we have a new quota for this infra on top of the available buildkite quota. Plan is to run the 2 presubmits in parallel, while we observe how things go, gather metrics, and make sure things are stable.We won't remove any buildkite machines until the other infra is stable.

https://github.com/llvm/llvm-project/pull/119635