misc CI/build system improvements #3883

Job	Run time
cross compilation	13m 3s
Format check	19s
Docker build check	3m 53s
Compilation check	49s
run itests	11m 45s
run itests postgres	20m 6s
Lint check	2m 10s
migration version check	12s
go mod check	27s
RPC check	1m 10s
run LiT tests	13m 52s
sample configuration check	23s
Sqlc check	39s
test vector check	2m 15s
run unit tests (unit-race)	14m 36s
run unit tests (unit-cover)	2m 17s
run unit tests (unit dbbackend=postgres)	5m 3s
finish	4s
	1h 33m 3s

Provide feedback