Fix insertion macro for Databricks Unity Catalog (#252)

* add database_name to spark__instert_into_metadata_table

* change strategy for fix for databricks insert macro

macros/insert_into_metadata_table.sql

@@ -6,7 +6,7 @@
 
 {% macro spark__insert_into_metadata_table(database_name, schema_name, table_name, content) -%}
     {% set insert_into_table_query %}
-    insert into {{ schema_name }}.{{ table_name }}
+    insert into {% if database_name %}{{ database_name }}.{% endif %}{{ schema_name }}.{{ table_name }}
     {{ content }}
     {% endset %}