Integration test reorg and build sharding #181

Job	Run time
unit-tests / Type checking (3.10, true)	43s
unit-tests / Unit (3.10)	46s
unit-tests / Type checking (3.10, false)	41s
unit-tests / Unit grpc (3.10)	48s
linting / lint	7s
create-project / create-project-job	39s
create-project / create-fixtures	58s
integration-tests / grpc 3.10	2m 50s
integration-tests / rest_asyncio 3.10 shard 5/5	3m 10s
integration-tests / rest_asyncio 3.10 shard 3/5	3m 55s
integration-tests / rest_asyncio 3.10 shard 1/5	4m 53s
integration-tests / rest_asyncio 3.10 shard 2/5	4m 54s
integration-tests / rest_asyncio 3.10 shard 4/5	3m 6s
integration-tests / rest 3.10 shard 3/10	3m 59s
integration-tests / rest 3.10 shard 1/10	3m 58s
integration-tests / rest 3.10 shard 2/10	3m 35s
integration-tests / rest 3.10 shard 6/10	3m 52s
integration-tests / rest 3.10 shard 8/10	4m 23s
integration-tests / rest 3.10 shard 5/10	5m 24s
integration-tests / rest 3.10 shard 7/10	2m 59s
integration-tests / rest 3.10 shard 10/10	6m 40s
integration-tests / rest 3.10 shard 4/10	3m 29s
integration-tests / rest 3.10 shard 9/10	3m 54s
cleanup-project / cleanup-project	54s
	1h 10m 37s

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