tests

chore: add venv helper and grpc dependencies #6338

Job	Run time
unit tests (3.10)	1m 11s
unit tests (3.14)	1m 17s
integration tests (windows-latest, 3.10)	2m 7s
integration tests (windows-latest, 3.14)	1m 59s
integration tests (macos-latest, 3.14)	1m 9s
integration tests (ubuntu-latest, 3.10)	1m 8s
integration tests (ubuntu-latest, 3.14)	1m 29s
integration tests (macos-latest, 3.10)	1m 28s
	11m 48s

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