Tests

CI: cache dependencies #1168

Job	Run time
Build deps [ubuntu]	4s
Build deps [ubuntu]	8m 41s
Build [docker]	9m 4s
Build [docker]	19m 28s
Documentation	21s
Documentation	40s
Build [macosx_arm64]	9m 8s
Build [macosx_arm64]	9m 13s
Shellcheck	6s
Shellcheck	5s
Build [ubuntu]	30s
Build [ubuntu]	31s
Build Prometheus plugin [ubuntu]	0s
Build Prometheus plugin [ubuntu]	0s
IT [${{ matrix.cluster }}/${{ matrix.mode }}]	0s
IT [${{ matrix.cluster }}/${{ matrix.mode }}]	0s
UT [python]	0s
UT [python]	0s
	57m 51s

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