[GSK-3846] Add support to LiteLLM #3949

Job	Run time
Check if wheel can be installed with using Poetry	1m 5s
Python 3.9 on ubuntu-latest	17m 42s
Build and check doc	6m 28s
Check if wheel can be installed with PDM	1m 29s
Python 3.10 on ubuntu-latest	18m 19s
Check if wheel can be installed with pip	58s
Python 3.11 on ubuntu-latest	17m 18s
Python 3.12 on ubuntu-latest	22m 57s
Python 3.10 on windows-2022	18m 58s
Python 3.10 on macos-latest	11m 44s
Python 3.10 (Pydantic V1) on ubuntu-latest	18m 37s
Python 3.10 (Pandas V1) on ubuntu-latest	17m 46s
Python 3.10 (Minimal langchain) on ubuntu-latest	17m 42s
retry-on-failure	0s
	2h 51m 3s

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