fix: proper cred loading for Databricks pt.3 #547

Job	Run time
Collect changes / collect-changes	5s
Python tests / types-check	1m 7s
Python tests / lint-and-format-check	39s
Python tests / unit-tests (py313)	2m 17s
Python tests / unit-tests (py312)	2m 18s
Python tests / unit-tests (py311)	2m 11s
Python tests / unit-tests (py310)	2m 3s
Python tests / unit-tests (py39)	2m 18s
status-check	1s
	12m 59s

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