linter: re-enable the linter #1383

Job	Run time
integration test	9m 12s
integration test	9m 12s
frontend tests on ubuntu-latest	2m 44s
frontend tests on ubuntu-latest	2m 44s
backend build on ubuntu-latest	5m 12s
backend build on ubuntu-latest	5m 12s
check commits	2m 17s
check commits	2m 17s
frontend tests on windows-latest	9m 12s
frontend tests on windows-latest	9m 41s
backend build on windows-latest	13m 40s
backend build on windows-latest	13m 40s
lint	3m 14s
lint	3m 14s
frontend tests on macOS-latest	6m 19s
frontend tests on macOS-latest	6m 19s
backend build on macOS-latest	11m 54s
backend build on macOS-latest	11m 54s
RPC proto compilation check	4m 55s
RPC proto compilation check	4m 55s
unit tests	1m 56s
unit tests	1m 56s
unit-race	2m 45s
unit-race	2m 45s
	2h 27m 9s

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