[MNG-8487] Completely isolate UTs #8540

Job	Run time
initial-build	3m 29s
full-build (ubuntu-latest, 17)	10m 5s
full-build (ubuntu-latest, 21)	9m 40s
integration-tests (ubuntu-latest, 17)	14m 48s
full-build (macos-latest, 17)	8m 22s
integration-tests (ubuntu-latest, 21)	14m 39s
full-build (macos-latest, 21)	7m 47s
integration-tests (macos-latest, 17)	14m 22s
integration-tests (macos-latest, 21)	12m 56s
full-build (windows-latest, 17)	14m 52s
integration-tests (windows-latest, 17)	21m 41s
full-build (windows-latest, 21)	14m 37s
integration-tests (windows-latest, 21)	20m 53s
	2h 48m 11s

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