ref(pydantic-ai): Remove set_data_normalized for the gen_ai.response.model attribute (#5512)

Remove `set_data_normalized()` for the `gen_ai.response.model` attribute in the `pydantic-ai` integration. The `model_name` field of `ModelResponse` is a `str` or `None` according to the type annotation, so no normalization is required.

Author: alexander-alderman-webb

sentry_sdk/integrations/pydantic_ai/spans/ai_client.py

@@ -207,7 +207,7 @@ def _set_output_data(span: "sentry_sdk.tracing.Span", response: "Any") -> None:
     if not response:
         return
 
-    set_data_normalized(span, SPANDATA.GEN_AI_RESPONSE_MODEL, response.model_name)
+    span.set_data(SPANDATA.GEN_AI_RESPONSE_MODEL, response.model_name)
     try:
         # Extract text from ModelResponse
         if hasattr(response, "parts"):