Add PSBT field to UnsealedAsset RPC message #3480

Job	Run time
Format check	22s
Compilation check	48s
cross compilation	4m 39s
Docker build check	3m 42s
run itests	8m 57s
run itests postgres	17m 27s
Lint check	2m 39s
migration version check	12s
go mod check	29s
RPC check	1m 19s
run LiT tests	2m 31s
sample configuration check	36s
Sqlc check	2m 56s
test vector check	47s
run unit tests (unit-race)	9m 20s
run unit tests (unit-cover)	2m 51s
run unit tests (unit dbbackend=postgres)	5m 43s
finish	3s
	1h 5m 21s

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