makefile: add unit test helpers #1946

Job	Run time
integration test	17m 24s
backend build on ubuntu-latest	2m 56s
backend build on windows-latest	12m 50s
frontend tests on ubuntu-latest	2m 16s
check commits	1m 5s
backend build on macOS-latest	5m 9s
frontend tests on windows-latest	5m 10s
lint	2m 6s
frontend tests on macOS-latest	2m 12s
check release notes updated	5s
run unit tests (unit-race)	3m 50s
RPC proto compilation check	3m 20s
run unit tests (unit)	34s
	58m 57s

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