refactor(redshift): read grants behavior flag directly (#2095)

Author: ragesh-g

dbt-redshift/src/dbt/adapters/redshift/impl.py

@@ -208,11 +208,6 @@ def drop_without_cascade(self) -> bool:
         """
         return bool(self.config.credentials.drop_without_cascade)
 
-    @available
-    def use_grants_extended(self) -> bool:
-        """Whether to use extended grants support for groups and roles."""
-        return self.behavior.redshift_grants_extended.no_warn
-
     @available
     def verify_database(self, database):
         if database.startswith('"'):
@@ -362,7 +357,7 @@ def standardize_grants_dict(self, grants_table: "agate.Table") -> dict:
         grants_dict: Dict[str, List[str]] = {}
         current_user = self.config.credentials.user.lower()
 
-        if not self.use_grants_extended():
+        if not self.behavior.redshift_grants_extended.no_warn:
             if not self.use_show_apis():
                 # pg_user query returns a 'grantee' column — delegate to base.
                 return super().standardize_grants_dict(grants_table)

dbt-redshift/src/dbt/include/redshift/macros/metadata/helpers.sql

@@ -3,7 +3,7 @@
 {% endmacro %}
 
 {% macro redshift__use_grants_extended() %}
-    {{ return(adapter.use_grants_extended()) }}
+    {{ return(adapter.behavior.redshift_grants_extended.no_warn) }}
 {% endmacro %}
 
 {% macro redshift__drop_without_cascade() %}