[psbt saga part 4/4]: Multisig demo #2379

Job	Run time
Compilation check	1m 15s
Format check	27s
cross compilation	7m 40s
Docker build check	2m 54s
run itests postgres	13m 54s
Lint check	2m 54s
run itests	7m 37s
go mod check	22s
RPC check	1m 1s
Sqlc check	24s
test vector check	1m 20s
run unit tests (unit-race)	5m 23s
run unit tests (unit-cover)	2m 53s
run unit tests (unit dbbackend=postgres)	4m 39s
	52m 43s

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