DOC: Docstrings Formatting Error PR09
Validation error `PR09 (Parameter description should end with ".")`. Removing this issue from the  code base enables the addition to the CI for automated testing in the future.

If you are working on this issue, it probably makes sense to check for error `PR08` in issue #25232 as well since they require similar changes.

`PR09` has 445 occurrences (see #27977 )

Todo:

- [ ] get rid of the errors in the code base
- [ ] update the code_check.sh script to take into account the PR09 type of errors
