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/proxy_unit_tests/test_proxy_server.py

@@ -928,7 +928,7 @@ async def test_get_team_redis(client_no_auth):
 
 
 import random
-import uuid
+from litellm._uuid import uuid
 from unittest.mock import AsyncMock, MagicMock, PropertyMock, patch
 
 from litellm.proxy._types import (