ci: Unpin Python version for LiteLLM tests (#5238)

Author: alexander-alderman-webb

scripts/populate_tox/config.py

@@ -231,7 +231,6 @@
     },
     "litellm": {
         "package": "litellm",
-        "python": ">3.9",  # https://github.com/BerriAI/litellm/issues/17701
     },
     "litestar": {
         "package": "litestar",