fix: add missing import for Mapping (#1267)

Author: parthea

packages/gapic-generator/gapic/ads-templates/%namespace/%name/%version/%sub/services/%service/client.py.j2

@@ -5,7 +5,7 @@
 from collections import OrderedDict
 import os
 import re
-from typing import Callable, Dict, Optional, {% if service.any_server_streaming %}Iterable, {% endif %}{% if service.any_client_streaming %}Iterator, {% endif %}Sequence, Tuple, Type, Union
+from typing import Callable, Dict, Mapping, Optional, {% if service.any_server_streaming %}Iterable, {% endif %}{% if service.any_client_streaming %}Iterator, {% endif %}Sequence, Tuple, Type, Union
 import pkg_resources
 {% if service.any_deprecated %}
 import warnings

packages/gapic-generator/gapic/templates/%namespace/%name_%version/%sub/services/%service/async_client.py.j2

@@ -5,7 +5,7 @@
 from collections import OrderedDict
 import functools
 import re
-from typing import Dict, Optional, {% if service.any_server_streaming %}AsyncIterable, Awaitable, {% endif %}{% if service.any_client_streaming %}AsyncIterator, {% endif %}Sequence, Tuple, Type, Union
+from typing import Dict, Mapping, Optional, {% if service.any_server_streaming %}AsyncIterable, Awaitable, {% endif %}{% if service.any_client_streaming %}AsyncIterator, {% endif %}Sequence, Tuple, Type, Union
 import pkg_resources
 {% if service.any_deprecated %}
 import warnings

packages/gapic-generator/gapic/templates/%namespace/%name_%version/%sub/services/%service/client.py.j2

@@ -9,7 +9,7 @@ import functools
 {% endif %}
 import os
 import re
-from typing import Dict, Optional, {% if service.any_server_streaming %}Iterable, {% endif %}{% if service.any_client_streaming %}Iterator, {% endif %}Sequence, Tuple, Type, Union
+from typing import Dict, Mapping, Optional, {% if service.any_server_streaming %}Iterable, {% endif %}{% if service.any_client_streaming %}Iterator, {% endif %}Sequence, Tuple, Type, Union
 import pkg_resources
 {% if service.any_deprecated %}
 import warnings

packages/gapic-generator/tests/integration/goldens/asset/google/cloud/asset_v1/services/asset_service/async_client.py

@@ -16,7 +16,7 @@
 from collections import OrderedDict
 import functools
 import re
-from typing import Dict, Optional, Sequence, Tuple, Type, Union
+from typing import Dict, Mapping, Optional, Sequence, Tuple, Type, Union
 import pkg_resources
 
 from google.api_core.client_options import ClientOptions

packages/gapic-generator/tests/integration/goldens/asset/google/cloud/asset_v1/services/asset_service/client.py

@@ -16,7 +16,7 @@
 from collections import OrderedDict
 import os
 import re
-from typing import Dict, Optional, Sequence, Tuple, Type, Union
+from typing import Dict, Mapping, Optional, Sequence, Tuple, Type, Union
 import pkg_resources
 
 from google.api_core import client_options as client_options_lib

packages/gapic-generator/tests/integration/goldens/credentials/google/iam/credentials_v1/services/iam_credentials/async_client.py

@@ -16,7 +16,7 @@
 from collections import OrderedDict
 import functools
 import re
-from typing import Dict, Optional, Sequence, Tuple, Type, Union
+from typing import Dict, Mapping, Optional, Sequence, Tuple, Type, Union
 import pkg_resources
 
 from google.api_core.client_options import ClientOptions

packages/gapic-generator/tests/integration/goldens/credentials/google/iam/credentials_v1/services/iam_credentials/client.py

@@ -16,7 +16,7 @@
 from collections import OrderedDict
 import os
 import re
-from typing import Dict, Optional, Sequence, Tuple, Type, Union
+from typing import Dict, Mapping, Optional, Sequence, Tuple, Type, Union
 import pkg_resources
 
 from google.api_core import client_options as client_options_lib

packages/gapic-generator/tests/integration/goldens/logging/google/cloud/logging_v2/services/config_service_v2/async_client.py

@@ -16,7 +16,7 @@
 from collections import OrderedDict
 import functools
 import re
-from typing import Dict, Optional, Sequence, Tuple, Type, Union
+from typing import Dict, Mapping, Optional, Sequence, Tuple, Type, Union
 import pkg_resources
 
 from google.api_core.client_options import ClientOptions

packages/gapic-generator/tests/integration/goldens/logging/google/cloud/logging_v2/services/config_service_v2/client.py

@@ -16,7 +16,7 @@
 from collections import OrderedDict
 import os
 import re
-from typing import Dict, Optional, Sequence, Tuple, Type, Union
+from typing import Dict, Mapping, Optional, Sequence, Tuple, Type, Union
 import pkg_resources
 
 from google.api_core import client_options as client_options_lib

packages/gapic-generator/tests/integration/goldens/logging/google/cloud/logging_v2/services/logging_service_v2/async_client.py

@@ -16,7 +16,7 @@
 from collections import OrderedDict
 import functools
 import re
-from typing import Dict, Optional, AsyncIterable, Awaitable, AsyncIterator, Sequence, Tuple, Type, Union
+from typing import Dict, Mapping, Optional, AsyncIterable, Awaitable, AsyncIterator, Sequence, Tuple, Type, Union
 import pkg_resources
 
 from google.api_core.client_options import ClientOptions