Integration test reorg and build sharding #186

Job	Run time
unit-tests / Unit grpc (3.10)	46s
unit-tests / Unit (3.10)	44s
unit-tests / Type checking (3.10, false)	36s
create-project / create-project-job	38s
unit-tests / Type checking (3.10, true)	43s
linting / lint	9s
create-project / create-fixtures	1m 4s
integration-tests / grpc 3.10	52m 56s
integration-tests / rest_asyncio 3.10 shard 3/5	3m 40s
integration-tests / rest_asyncio 3.10 shard 4/5	3m 14s
integration-tests / rest_asyncio 3.10 shard 2/5	4m 36s
integration-tests / rest 3.10 shard 4/10	6m 20s
integration-tests / rest_asyncio 3.10 shard 5/5	2m 43s
integration-tests / rest 3.10 shard 5/10	6m 6s
integration-tests / rest_asyncio 3.10 shard 1/5	4m 31s
integration-tests / rest 3.10 shard 2/10	2m 53s
integration-tests / rest 3.10 shard 6/10	6m 16s
integration-tests / rest 3.10 shard 8/10	3m 0s
integration-tests / rest 3.10 shard 9/10	4m 40s
integration-tests / rest 3.10 shard 1/10	5m 59s
integration-tests / rest 3.10 shard 3/10	4m 24s
integration-tests / rest 3.10 shard 10/10	6m 37s
integration-tests / rest 3.10 shard 7/10	2m 52s
cleanup-project / cleanup-project	58s
	2h 6m 25s

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