https://github.com/actions/checkout/releases/tag/v5.0.0 was released a
couple of days ago (still new, sufficient bake time that there probably
is not a significant security issue). There are few changes, with the
most notable ones being dependency bumps, specifically the node version
bump to v24. This requires actions runner v2.327.1. I will land this
after all of the infrastructure has been moved over to the new runner
version.
This patch replaces all instances of ubuntu-latest with ubuntu-24.04
(outside of the entries in libc++) based on the guidelines in the LLVM
CI best practices doc (https://llvm.org/docs/CIBestPractices.html).
