Add docs for automatic var files in test directories #34349
Merged
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Update the testing docs to reflect the new functionality added in #34341. Now, automatic variable files defined within specific test directories will load and apply their contents to tests also defined in the same test directory.
This PR also contains a quick fix for a small piece of missing functionality that was forgotten in the previous PR.
Target Release
1.7.0
Draft CHANGELOG entry
N/A - we already have a CHANGELOG entry from #34341.