Add WatsonX support #4101

Job	Run time
Python 3.8 extended tests	4m 35s
Python 3.9 extended tests	4m 30s
Python 3.10 extended tests	5m 24s
Python 3.11 extended tests	5m 5s
lint / build (3.8)	4m 49s
pydantic-compatibility / Pydantic v1/v2 compatibility - Python 3.8	1m 55s
lint / build (3.11)	4m 32s
pydantic-compatibility / Pydantic v1/v2 compatibility - Python 3.9	2m 11s
pydantic-compatibility / Pydantic v1/v2 compatibility - Python 3.10	1m 55s
pydantic-compatibility / Pydantic v1/v2 compatibility - Python 3.11	1m 48s
test / Python 3.8	1m 52s
test / Python 3.9	1m 41s
test / Python 3.10	1m 56s
test / Python 3.11	2m 13s
	44m 26s

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