fix: use fastuuid helper (#14903)

* fix: use fastuuid helper across the codebase

First batch of changes, simple drop in replacement.

* second batch of changes

* fixed: script mistake on helper file

tests/multi_instance_e2e_tests/test_update_team_e2e.py

@@ -52,7 +52,7 @@ async def chat_completion_on_port(
     Accepts an optional prompt string.
     """
     from openai import AsyncOpenAI
-    import uuid
+    from litellm._uuid import uuid
 
     if prompt is None:
         prompt = f"Say hello! {uuid.uuid4()}" * 100