Make OpenAI span data OTel compatible (#4613)

Make sure all OpenTelemetry semantic conventions for AI clients and also
the Sentry Conventions are adhered to.

Also cleans up the code a bit for better readability/maintenance.

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Co-authored-by: Ivana Kellyer <[email protected]>

Author: antonpirker

sentry_sdk/consts.py

@@ -417,7 +417,7 @@ class SPANDATA:
     GEN_AI_REQUEST_MODEL = "gen_ai.request.model"
     """
     The model identifier being used for the request.
-    Example: "gpt-4-turbo-preview"
+    Example: "gpt-4-turbo"
     """
 
     GEN_AI_REQUEST_PRESENCE_PENALTY = "gen_ai.request.presence_penalty"