ci: Include files in hidden directories when testing for code changes

This is the proper fix for !10605 (merged) . It now includes subdirectories at any level instead of just the first. In the previous MR the pipeline was triggered from the rules.yml updated instead of the indented file. See discussion here.

On a second look, !10605 (merged) looks inconsistent from the other rules that use /**/* instead of just /*/ to recurse. Based on this test it should work. Going forward I will be using this glob tool to make sure we test these cases before merging.