Fix _get_cache_schemas by removing relation identifiers (#53)

Co-authored-by: Michelle Ark <[email protected]>
Co-authored-by: Mike Alfare <[email protected]>

dbt/adapters/base/impl.py

@@ -421,7 +421,7 @@ def _get_cache_schemas(self, relation_configs: Iterable[RelationConfig]) -> Set[
         populate.
         """
         return {
-            self.Relation.create_from(quoting=self.config, relation_config=relation_config)
+            self.Relation.create_from(quoting=self.config, relation_config=relation_config).without_identifier()
             for relation_config in relation_configs
         }