fix(anthropic): Stop unpacking output arrays (#8160)

The specific problem this fixes is text output parts that are JSON. These are returned when the user of the `anthropic` package provides a custom JSON schema to the model request. The product cannot render this format for `gen_ai.response.text`.

Author: alexander-alderman-webb

sentry_sdk/integrations/anthropic.py

@@ -710,7 +710,10 @@ def _set_output_data(
 
         if len(output_messages["response"]) > 0:
             set_data_normalized(
-                span, SPANDATA.GEN_AI_RESPONSE_TEXT, output_messages["response"]
+                span,
+                SPANDATA.GEN_AI_RESPONSE_TEXT,
+                output_messages["response"],
+                unpack=False,
             )
 
     if input_tokens is not None: