rpc: implement DecodeAssetInvoice #3618

Job	Run time
Format check	2m 42s
Format check	2m 42s
Docker build check	3m 39s
Docker build check	3m 39s
cross compilation	15m 11s
cross compilation	15m 11s
Compilation check	4m 59s
Compilation check	4m 59s
run itests	13m 58s
run itests	13m 58s
run itests postgres	21m 20s
run itests postgres	21m 20s
Lint check	3m 48s
Lint check	3m 48s
migration version check	14s
migration version check	14s
go mod check	2m 34s
go mod check	2m 34s
RPC check	3m 26s
RPC check	3m 26s
run LiT tests	11m 6s
run LiT tests	19m 7s
sample configuration check	3m 59s
sample configuration check	3m 59s
Sqlc check	4m 58s
Sqlc check	4m 58s
test vector check	4m 15s
test vector check	4m 15s
run unit tests (unit-race)	11m 37s
run unit tests (unit-race)	11m 37s
run unit tests (unit-cover)	6m 49s
run unit tests (unit-cover)	6m 49s
run unit tests (unit dbbackend=postgres)	6m 5s
run unit tests (unit dbbackend=postgres)	6m 5s
finish	4s
finish	4s
	4h 9m 29s

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