feat(js-sdk): Make credentials configurable in SDK #34427

Job	Run time
setup	2m 39s
integration-tests-packages	13m 27s
Shard (0) HTTP Integration Tests	12m 10s
Shard (1) HTTP Integration Tests	9m 4s
Shard (0) Module Integration Tests	11m 4s
Shard (1) Module Integration Tests	9m 33s
Shard (0) Unit Tests	9m 0s
Shard (1) Unit Tests	5m 13s
unit-tests	1s
integration-tests-modules	1s
integration-tests-http	1s
	1h 12m 13s

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