Jonathan Desrosiers 983db64546 Build/Test Tools: 6.8 post-branching updates.
This makes some post-branching changes to the 6.8 branch:
- Pins the most newest supported version of PHP for the local Docker environment
- Switches to using remote references for GitHub Action workflows
- Removes GitHub Action workflow files that will never run from this branch.

See #63164.

git-svn-id: https://develop.svn.wordpress.org/branches/6.8@60092 602fd350-edb4-49c9-b593-d223f7449a82
2025-03-25 16:38:02 +00:00
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