Python: Configure top_p and temp for assistant agents if configured (#…

…10163)

### Motivation and Context

The assistant agent class was storing top_p and temp, but never sending
it during agent creation.

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### Description

Send the top_p and temp params if configured while creating an assistant
agent.
- Closes #10162

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### Contribution Checklist

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- [X] The code builds clean without any errors or warnings
- [X] The PR follows the [SK Contribution
Guidelines](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md)
and the [pre-submission formatting
script](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md#development-scripts)
raises no violations
- [X] All unit tests pass, and I have added new tests where possible
- [X] I didn't break anyone 😄

python/semantic_kernel/agents/open_ai/open_ai_assistant_base.py

@@ -270,13 +270,21 @@ async def create_assistant(
         if kwargs:
             create_assistant_kwargs.update(kwargs)
 
-        execution_settings = {}
+        execution_settings: dict[str, Any] = {}
         if self.max_completion_tokens:
             execution_settings["max_completion_tokens"] = self.max_completion_tokens
 
         if self.max_prompt_tokens:
             execution_settings["max_prompt_tokens"] = self.max_prompt_tokens
 
+        if self.top_p is not None:
+            execution_settings["top_p"] = self.top_p
+            create_assistant_kwargs["top_p"] = self.top_p
+
+        if self.temperature is not None:
+            execution_settings["temperature"] = self.temperature
+            create_assistant_kwargs["temperature"] = self.temperature
+
         if self.parallel_tool_calls_enabled:
             execution_settings["parallel_tool_calls_enabled"] = self.parallel_tool_calls_enabled