chore: regenerate google-cloud-bigtable (#18141)

Fixes #18129

Author: parthea

packages/google-cloud-bigtable/tests/unit/data/_async/test_client.py

@@ -1596,9 +1596,10 @@ async def test_call_metadata(self, include_app_profile, fn_name, fn_args, gapic_
             # incomplete mutation, so an empty mock stream would retry until the
             # operation timeout. Return a success entry for the single mutation
             # so the operation completes after a single attempt.
-            from google.cloud.bigtable_v2.types import MutateRowsResponse
             from google.rpc import status_pb2
 
+            from google.cloud.bigtable_v2.types import MutateRowsResponse
+
             @CrossSync.convert
             async def mutate_rows_stream(*args, **kwargs):
                 yield MutateRowsResponse(