Changes to Test Databricks connection credentials

added the optional property system_access_warning to the response with the 200 status

added the optional property unreadable_system_tables to the response with the 200 status

endpoint reactivated

added the new optional request property oneOf[subschema #1: DatabricksConnectionTestRequestPAT]/sql_warehouse_id

added the new optional request property oneOf[subschema #1: DatabricksConnectionTestRequestPAT]/workspace_url

added the new optional request property oneOf[subschema #2: DatabricksConnectionTestRequestOAuthM2M]/sql_warehouse_id

added the new optional request property oneOf[subschema #2: DatabricksConnectionTestRequestOAuthM2M]/workspace_url

added the optional property catalogs_complete to the response with the 200 status

added the optional property cloud_warning to the response with the 200 status