[psbt saga part 4/4]: Multisig demo #2322

Job	Run time
cross compilation	3m 28s
Compilation check	31s
Format check	34s
run itests	6m 19s
Docker build check	2m 51s
run itests postgres	12m 9s
Lint check	2m 13s
go mod check	35s
RPC check	1m 14s
Sqlc check	33s
test vector check	1m 5s
run unit tests (unit-race)	5m 21s
run unit tests (unit-cover)	1m 53s
run unit tests (unit dbbackend=postgres)	4m 2s
	42m 48s

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