github: run LiT itests & unit tests as part of CI #3128

Job	Run time
Compilation check	57s
Format check	31s
cross compilation	10m 4s
Docker build check	3m 9s
run itests	9m 33s
run itests postgres	17m 38s
Lint check	2m 37s
migration version check	14s
go mod check	21s
RPC check	1m 11s
sample configuration check	36s
Sqlc check	33s
test vector check	52s
trigger LiT itests	16m 22s
run unit tests (unit-race)	6m 33s
run unit tests (unit-cover)	3m 33s
run unit tests (unit dbbackend=postgres)	4m 55s
finish	3s
	1h 19m 42s

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