Finish cleaning up the fhirpath filter shorthand table and file.

[jimmyfagan]

User Story

As a ReportStream developer, I'd like to simplify organization filters to not have dependencies on the shorthand table.

Description/Use Case

The fhirpath filter shorthand table adds some complication, especially on deployment, for not a lot of benefit. Removing it will make filters easier to understand and debug.

Risks/Impacts/Considerations

Need to make sure #13251 is completed first to avoid impacting staging/prod settings.

Dev Notes

We should remove the table as well as any code that specifically references that table.

Acceptance Criteria

• [ ] fhirpath_filter_shorthand.csv file is removed from the repo
• [ ] References to the shorthand variables in organizations.yml files have been removed
• [ ] Any code specifically dealing with that table has been removed.