Jonathan Desrosiers 44d543f94e Build/Test Tools: Restore automated testing in the 4.7 branch.
This commit merges the workflow files required to run automated testing on GitHub Actions.

In addition, [49836] and [50285] have been included in order to keep the local Docker environment consistent across all branches.

Merges [49162,49168-49169,49175,49204,49227-49228,49244,49369,49371,49548,49781-49784,49786,49836,49938,50268,50285,50298] to the 4.7 branch.
See #50401.

git-svn-id: https://develop.svn.wordpress.org/branches/4.7@50310 602fd350-edb4-49c9-b593-d223f7449a82
2021-02-12 19:41:42 +00:00
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