fix: Add async context manager return types (#645)

* fix: Add async context manager return types

chore: Mock return_value should not populate oneof message fields

chore: Support snippet generation for services that only support REST transport

chore: Update gapic-generator-python to v1.11.0
PiperOrigin-RevId: 545430278

Source-Link: googleapis/googleapis@601b532

Source-Link: https://github.com/googleapis/googleapis-gen/commit/b3f18d0f6560a855022fd058865e7620479d7af9
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiYjNmMThkMGY2NTYwYTg1NTAyMmZkMDU4ODY1ZTc2MjA0NzlkN2FmOSJ9

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: gcf-owl-bot[bot]

google/cloud/dialogflow_v2/services/agents/async_client.py

@@ -1533,7 +1533,7 @@ async def list_locations(
         # Done; return the response.
         return response
 
-    async def __aenter__(self):
+    async def __aenter__(self) -> "AgentsAsyncClient":
         return self
 
     async def __aexit__(self, exc_type, exc, tb):

google/cloud/dialogflow_v2/services/answer_records/async_client.py

@@ -755,7 +755,7 @@ async def list_locations(
         # Done; return the response.
         return response
 
-    async def __aenter__(self):
+    async def __aenter__(self) -> "AnswerRecordsAsyncClient":
         return self
 
     async def __aexit__(self, exc_type, exc, tb):

google/cloud/dialogflow_v2/services/contexts/async_client.py

@@ -1185,7 +1185,7 @@ async def list_locations(
         # Done; return the response.
         return response
 
-    async def __aenter__(self):
+    async def __aenter__(self) -> "ContextsAsyncClient":
         return self
 
     async def __aexit__(self, exc_type, exc, tb):

google/cloud/dialogflow_v2/services/conversation_datasets/async_client.py

@@ -1127,7 +1127,7 @@ async def list_locations(
         # Done; return the response.
         return response
 
-    async def __aenter__(self):
+    async def __aenter__(self) -> "ConversationDatasetsAsyncClient":
         return self
 
     async def __aexit__(self, exc_type, exc, tb):

google/cloud/dialogflow_v2/services/conversation_models/async_client.py

@@ -1599,7 +1599,7 @@ async def list_locations(
         # Done; return the response.
         return response
 
-    async def __aenter__(self):
+    async def __aenter__(self) -> "ConversationModelsAsyncClient":
         return self
 
     async def __aexit__(self, exc_type, exc, tb):

google/cloud/dialogflow_v2/services/conversation_profiles/async_client.py

@@ -1426,7 +1426,7 @@ async def list_locations(
         # Done; return the response.
         return response
 
-    async def __aenter__(self):
+    async def __aenter__(self) -> "ConversationProfilesAsyncClient":
         return self
 
     async def __aexit__(self, exc_type, exc, tb):

google/cloud/dialogflow_v2/services/conversations/async_client.py

@@ -1325,7 +1325,7 @@ async def list_locations(
         # Done; return the response.
         return response
 
-    async def __aenter__(self):
+    async def __aenter__(self) -> "ConversationsAsyncClient":
         return self
 
     async def __aexit__(self, exc_type, exc, tb):

google/cloud/dialogflow_v2/services/documents/async_client.py

@@ -1524,7 +1524,7 @@ async def list_locations(
         # Done; return the response.
         return response
 
-    async def __aenter__(self):
+    async def __aenter__(self) -> "DocumentsAsyncClient":
         return self
 
     async def __aexit__(self, exc_type, exc, tb):

google/cloud/dialogflow_v2/services/entity_types/async_client.py

@@ -1882,7 +1882,7 @@ async def list_locations(
         # Done; return the response.
         return response
 
-    async def __aenter__(self):
+    async def __aenter__(self) -> "EntityTypesAsyncClient":
         return self
 
     async def __aexit__(self, exc_type, exc, tb):

google/cloud/dialogflow_v2/services/environments/async_client.py

@@ -1082,7 +1082,7 @@ async def list_locations(
         # Done; return the response.
         return response
 
-    async def __aenter__(self):
+    async def __aenter__(self) -> "EnvironmentsAsyncClient":
         return self
 
     async def __aexit__(self, exc_type, exc, tb):