ci: Include files in hidden directories when testing for code changes
.run_on_code_change
rules now includes testing for code changes within hidden directories.
This was missing before and changes under .gitlab/
directory didn't trigger the pipeline.
Tested on !10600 (merged) compare :
- without the patch https://gitlab.kitware.com/vtk/vtk/-/pipelines/370559
- with the patch https://gitlab.kitware.com/vtk/vtk/-/pipelines/370884