fix(hive): use validated metastore connection check in partition guard

Author: mohitjeswani01

ingestion/src/metadata/ingestion/source/database/hive/metadata.py

@@ -161,7 +161,8 @@ def get_table_partition_details(
         # When metastore connection is configured, self.engine is a
         # MySQL/Postgres engine — DESCRIBE FORMATTED will fail against it.
         # Skip partition detection in this case.
-        if getattr(self.service_connection, "metastoreConnection", None):
+        metastore_conn = self._get_validated_metastore_connection()
+        if metastore_conn:
             logger.debug(
                 "Skipping partition key detection for"
                 f" {schema_name}.{table_name}: metastoreConnection"