Python: Properly handle AzureAI Search results for AzureAIAgent

[moonbox3]

Motivation and Context

After the Azure AI Agent service went to GA, there were some updates in the underlying SDK. When there are azure_ai_search results while running the agent, they no longer show up as attributes related to the tool call. They are present in the dictionary, so our current code is failing when trying to access the attribute. This PR updates how we form the FunctionCallContent or FunctionResultContent for both azure_ai_search streaming and non-streaming.

Description

Update how we form the FunctionCallContent or FunctionResultContent for both azure_ai_search streaming and non-streaming for the AzureAIAgent.

• Closes Python: Bug: AttributeError in azure_ai_agent when invoking agent with RAG (Azure AI Search) on v1.32.2 #12422

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the SK Contribution Guidelines and the pre-submission formatting script raises no violations
• All unit tests pass, and I have added new tests where possible
• I didn't break anyone 😄

[markwallace-microsoft]

Python Test Coverage Report •

File	Stmts	Miss	Cover	Missing
agents/azure_ai
agent_content_generation.py	279	110	60%	74–75, 77, 95, 97, 219, 222, 262, 287–288, 296, 304, 307–309, 318–320, 328, 336, 338, 346, 353, 359–361, 363, 365–367, 376–378, 387, 427, 466–467, 469–472, 474–476, 479–480, 482, 492–493, 495, 508–509, 511, 513–519, 529–531, 540, 557–558, 560, 562–569, 578, 587, 601–602, 604, 606–608, 610–614, 624–626, 635–636, 638, 664–671, 677–680, 685, 690–691, 698
TOTAL	26431	4517	82%

Python Unit Test Overview

Tests	Skipped	Failures	Errors	Time
3639	22 💤	0 ❌	0 🔥	1m 54s ⏱️