Add record_categories and record_types tables with data population and foreign key constraints

[maxachis]

Fixes

• Partially addresses https://github.com/Police-Data-Accessibility-Project/data-sources-app/issues/352 and https://github.com/Police-Data-Accessibility-Project/data-sources-app/issues/345

Description

• Creates and populates record_categories and record_types tables
• Deletes test data sources
• Creates data_sources.record_type_id, as a foreign key to the record_types table, which refers to the record_type.id values corresponding to the string values in data_sources.record_type.

Testing

• Not applicable.

Performance

• One-time Database changes. Not applicable.

Docs

• Not applicable.