macro create schema should support a location

[mvdwielen]

dbt-databricks should override the default dbt create_schema(relation) macro in such a location of the schema (and the tables within the schema) can be provided. This way the schema and tables can be stored on an external location like an ADLS storage account. This way the schema and tables within the schema become managed in such the physical data of the schema and tables will be deleted as well when the schema and / or tables are dropped.

[github-actions[bot]]

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[benc-db]

Reactivating this issue. Also, should be able to specify whether tables created under that schema should be external or managed.