ci: reduce unit test flakiness and shard re-run cost (#3844) #3193

Job	Run time
typecheck / typecheck	6m 47s
units / e2e-webapp / 🧪 E2E Tests: Webapp	3m 2s
units / packages / 🧪 Unit Tests: Packages (1, 1)	11m 44s
units / internal / 🧪 Unit Tests: Internal (8, 8)	6m 15s
units / internal / 🧪 Unit Tests: Internal (4, 8)	5m 49s
units / internal / 🧪 Unit Tests: Internal (7, 8)	5m 18s
units / internal / 🧪 Unit Tests: Internal (6, 8)	5m 10s
units / internal / 🧪 Unit Tests: Internal (1, 8)	9m 0s
units / internal / 🧪 Unit Tests: Internal (2, 8)	11m 59s
units / webapp / 🧪 Unit Tests: Webapp (3, 8)	3m 26s
units / webapp / 🧪 Unit Tests: Webapp (2, 8)	4m 42s
units / internal / 🧪 Unit Tests: Internal (3, 8)	8m 36s
units / webapp / 🧪 Unit Tests: Webapp (5, 8)	4m 53s
units / webapp / 🧪 Unit Tests: Webapp (8, 8)	7m 4s
units / webapp / 🧪 Unit Tests: Webapp (6, 8)	3m 17s
units / webapp / 🧪 Unit Tests: Webapp (4, 8)	8m 23s
units / webapp / 🧪 Unit Tests: Webapp (7, 8)	8m 41s
units / internal / 🧪 Unit Tests: Internal (5, 8)	5m 6s
units / webapp / 🧪 Unit Tests: Webapp (1, 8)	6m 39s
publish-worker / build (docker-provider)	2m 29s
publish-worker-v4 / build (supervisor)	2m 46s
publish-webapp / publish	6m 12s
publish-worker / build (coordinator)	1m 42s
publish-worker / build (kubernetes-provider)	1m 12s
units / webapp / 📊 Merge Reports	44s
units / packages / 📊 Merge Reports	15s
units / internal / 📊 Merge Reports	22s
scan-webapp / Scan	32s
	2h 22m 5s

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