Add LiT CI job and runner cleanup action #2770

Job	Run time
RPC compilation check	1m 33s
go mod check	11m 39s
build and lint code	5m 3s
verify that auto-generated documentation is up-to-date	46s
SQL compilation check	9s
run unit tests	18m 48s
run LiT tests	13m 37s
	51m 35s

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