Python: Add function_choice_behavior support to Azure AI and OpenAI Assistant agents #10688

Job	Run time
Python Unit Tests (3.12, macos-latest, false, dapr)	20s
Python Unit Tests (3.11, windows-latest, false, unit-all-except-dapr)	25s
Python Unit Tests (3.12, ubuntu-latest, false, unit-all-except-dapr)	21s
Python Unit Tests (3.11, ubuntu-latest, false, unit-all-except-dapr)	21s
Python Unit Tests (3.11, ubuntu-latest, false, dapr)	26s
Python Unit Tests (3.10, windows-latest, false, dapr)	24s
Python Unit Tests (3.12, windows-latest, false, dapr)	18s
Python Unit Tests (3.10, windows-latest, false, unit-all-except-dapr)	23s
Python Unit Tests (3.12, windows-latest, false, unit-all-except-dapr)	24s
Python Unit Tests (3.12, ubuntu-latest, false, dapr)	24s
Python Unit Tests (3.11, windows-latest, false, dapr)	24s
Python Unit Tests (3.13, ubuntu-latest, true, unit-all-except-dapr)	35s
Python Unit Tests (3.12, macos-latest, false, unit-all-except-dapr)	20s
Python Unit Tests (3.10, ubuntu-latest, false, unit-all-except-dapr)	21s
Python Unit Tests (3.10, ubuntu-latest, false, dapr)	20s
	5m 46s

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