This ensures that `WP_UnitTestCase::skipOnAutomatedBranches()` has access to these variables so that time sensitive tests can be skipped when appropriate.
This also updates that logic to be more clear.
Follow up to [49264].
Props ocean90, johnbillion.
See #50401, #49050, #47767.
git-svn-id: https://develop.svn.wordpress.org/trunk@49267 602fd350-edb4-49c9-b593-d223f7449a82