Repo checks: skip docstring checks if not in the diff (#32328)

* tmp

* skip files not in the diff

* use git.Repo instead of an external subprocess

* add tiny change to confirm that the diff is working on pushed changes

* add make quality task

* more profesh main commit reference

Makefile

@@ -56,6 +56,7 @@ quality:
 	python utils/custom_init_isort.py --check_only
 	python utils/sort_auto_mappings.py --check_only
 	python utils/check_doc_toc.py
+	python utils/check_docstrings.py --check_all
 
 
 # Format source code automatically and check is there are any problems left that need manual fixing