Add the option on path creator to specify the incoming channel on blinded path #16852

Job	Run time
check commits	16m 33s
RPC and mobile compilation check	3m 28s
Sqlc check	2m 40s
cross compilation	30m 27s
lint code	6m 43s
check pinned dependencies (google.golang.org/grpc v1.59.0)	4s
run macOS itest	48m 19s
check pinned dependencies (github.com/golang/protobuf v1.5.3)	4s
sample configuration check	1m 44s
run ubuntu itests (btcd, backend=btcd cover=1)	32m 13s
run unit tests (btcd unit-cover)	19m 29s
run ubuntu itests (bitcoind, backend=bitcoind cover=1)	40m 37s
run unit tests (unit tags="kvdb_etcd")	20m 47s
run ubuntu itests (bitcoind-notxindex, backend="bitcoind notxindex")	39m 37s
run unit tests (unit tags="kvdb_postgres")	19m 59s
run windows itest	6m 57s
run ubuntu itests (bitcoind-rpcpolling, backend="bitcoind rpcpolling" cover=1)	41m 29s
run unit tests (unit tags="kvdb_sqlite")	18m 29s
run ubuntu itests (bitcoind-etcd, backend=bitcoind dbbackend=etcd)	54m 26s
run unit tests (btcd unit-race)	40m 10s
run ubuntu itests (bitcoind-postgres, backend=bitcoind dbbackend=postgres)	1h 9m 26s
run unit tests (unit-module)	1m 5s
run ubuntu itests (bitcoind-sqlite, backend=bitcoind dbbackend=sqlite)	41m 19s
run ubuntu itests (bitcoind-postgres-nativesql, backend=bitcoind dbbackend=postgres nativesql=true)	1h 9m 30s
run ubuntu itests (bitcoind-sqlite-nativesql, backend=bitcoind dbbackend=sqlite nativesql=true)	42m 10s
check release notes updated	5s
run ubuntu itests (neutrino, backend=neutrino cover=1)	38m 58s
finish	4s
	11h 46m 52s

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