Integration test reorg and build sharding #180

Job	Run time
linting / lint	7s
unit-tests / Type checking (3.10, false)	42s
unit-tests / Unit grpc (3.10)	53s
create-project / create-project-job	35s
unit-tests / Unit (3.10)	40s
unit-tests / Type checking (3.10, true)	46s
create-project / create-fixtures	1m 0s
cleanup-project / cleanup-project	1m 12s
integration-tests	0s
	5m 55s

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