workflow: replace `swapserverrpc` in `lit-setup` #2814

Job	Run time
run unit-test sqlite3 race	9m 12s
SQL compilation check	10s
run LiT itests	7m 22s
run LiT unit tests	7m 10s
RPC compilation check	1m 35s
run unit-test postgres race	10m 56s
build and lint code	8m 8s
verify that auto-generated documentation is up-to-date	3m 29s
go mod check	10m 1s
SQL compilation check	10s
build and lint code	8m 8s
run unit-test sqlite3 race	9m 12s
verify that auto-generated documentation is up-to-date	3m 29s
RPC compilation check	1m 35s
run LiT unit tests	7m 10s
go mod check	10m 42s
run unit-test postgres race	10m 56s
run LiT itests	7m 22s
	1h 56m 47s

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