Dev 11608 update clean postgres sql for spark

[zachflanders-frb]

Description:
This addresses issues with the clean_postgres_sql_for_spark_sql to enable the regex to work for replacing functions.

Technical details:
The updated regex will find matches including between ( ( characters and then replace the old text match with the new text while retaining the surrounding characters.

Requirements for PR merge:

1. Unit & integration tests updated
2. Necessary PR reviewers:
   • Backend
3. Jira Ticket DEV-11608:
   • Link to this Pull-Request

Area for explaining above N/A when needed:

2. [ ] API documentation updated
4. [ ] Matview impact assessment completed
5. [ ] Frontend impact assessment completed
6. [ ] Data validation completed
7. [ ] Appropriate Operations ticket(s) created