Add a check on config classes docstring checkpoints (#17012)

* Add the check

* add missing ckpts

* add a list to ignore

* call the added check script

* better regex pattern

Co-authored-by: ydshieh <ydshieh@users.noreply.github.com>

.circleci/config.yml

@@ -881,6 +881,7 @@ jobs:
             - run: python utils/check_dummies.py
             - run: python utils/check_repo.py
             - run: python utils/check_inits.py
+            - run: python utils/check_config_docstrings.py
             - run: make deps_table_check_updated
             - run: python utils/tests_fetcher.py --sanity_check