spark__get_relations_by_pattern now respects database given

[VDFaller]

This just makes it so the database to spark__get_relations_by_pattern actually does something. Currently it seems to ONLY do the target.database.

Unclear what to do about testing since at least the integration test seems to be explicitly disabled 3 years ago. I just tested using dbt-databricks =1.5.5

Happy to do whatever else.