Implement PrevId[] UTXO selection for FundVirtualPSBT RPC method; valid for single PrevId at first #3512

Job	Run time
cross compilation	4m 29s
Compilation check	41s
Format check	19s
Docker build check	3m 47s
run itests	1m 7s
run itests postgres	1m 38s
Lint check	2m 30s
migration version check	10s
go mod check	25s
run LiT tests	12m 22s
RPC check	1m 12s
sample configuration check	35s
Sqlc check	2m 42s
test vector check	44s
run unit tests (unit-race)	11m 17s
run unit tests (unit-cover)	2m 50s
run unit tests (unit dbbackend=postgres)	6m 17s
finish	5s
	53m 10s

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