[wallet]: fix signing interaction with lnd, allowing restore from seed #3476

Job	Run time
Docker build check	3m 42s
cross compilation	11m 18s
Format check	2m 31s
Compilation check	1m 10s
run itests	12m 44s
run itests postgres	21m 15s
Lint check	5m 18s
migration version check	10s
go mod check	2m 32s
run LiT tests	6m 9s
RPC check	3m 26s
sample configuration check	3m 22s
Sqlc check	4m 53s
test vector check	3m 30s
run unit tests (unit-race)	9m 30s
run unit tests (unit-cover)	5m 55s
run unit tests (unit dbbackend=postgres)	5m 41s
finish	3s
	1h 43m 9s

Provide feedback