Python: Fix sample bugs in file search and web search samples (#4049)

- Fix file search samples: return vector_store.id string instead of
  Content object to avoid JSON serialization error
- Fix web search sample: use correct web_search_options parameter for
  ChatClient instead of ResponsesClient's user_location parameter
- Fix assistants client: pass tool_resources from options to run_options
  so vector store IDs reach thread creation
- Add error handling for cleanup in Azure file search sample

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

python/samples/02-agents/providers/azure_openai/azure_responses_client_with_file_search.py

@@ -1,8 +1,9 @@
 # Copyright (c) Microsoft. All rights reserved.
 
 import asyncio
+import contextlib
 
-from agent_framework import Agent, Content
+from agent_framework import Agent
 from agent_framework.azure import AzureOpenAIResponsesClient
 from azure.identity import AzureCliCredential
 
@@ -22,7 +23,7 @@ Prerequisites:
 # Helper functions
 
 
-async def create_vector_store(client: AzureOpenAIResponsesClient) -> tuple[str, Content]:
+async def create_vector_store(client: AzureOpenAIResponsesClient) -> tuple[str, str]:
     """Create a vector store with sample documents."""
     file = await client.client.files.create(
         file=("todays_weather.txt", b"The weather today is sunny with a high of 75F."), purpose="assistants"
@@ -35,13 +36,15 @@ async def create_vector_store(client: AzureOpenAIResponsesClient) -> tuple[str,
     if result.last_error is not None:
         raise Exception(f"Vector store file processing failed with status: {result.last_error.message}")
 
-    return file.id, Content.from_hosted_vector_store(vector_store_id=vector_store.id)
+    return file.id, vector_store.id
 
 
 async def delete_vector_store(client: AzureOpenAIResponsesClient, file_id: str, vector_store_id: str) -> None:
     """Delete the vector store after using it."""
-    await client.client.vector_stores.delete(vector_store_id=vector_store_id)
-    await client.client.files.delete(file_id=file_id)
+    with contextlib.suppress(Exception):
+        await client.client.vector_stores.delete(vector_store_id=vector_store_id)
+    with contextlib.suppress(Exception):
+        await client.client.files.delete(file_id=file_id)
 
 
 async def main() -> None: