Add the option on path creator to specify the incoming channel on blinded path #16709

Job	Run time
check commits	5m 7s
RPC and mobile compilation check	5m 50s
cross compilation	11m 20s
lint code	6m 2s
check pinned dependencies (google.golang.org/grpc v1.59.0)	3s
sample configuration check	1m 42s
check pinned dependencies (github.com/golang/protobuf v1.5.3)	4s
Sqlc check	1m 15s
run unit tests (btcd unit-cover)	11m 19s
run macOS itest	11m 22s
run unit tests (unit tags="kvdb_etcd")	11m 19s
check release notes updated	6s
run unit tests (unit tags="kvdb_postgres")	11m 20s
run unit tests (unit tags="kvdb_sqlite")	11m 17s
run windows itest	7m 51s
run unit tests (btcd unit-race)	11m 17s
run ubuntu itests (btcd, backend=btcd cover=1)	5m 35s
run unit tests (unit-module)	1m 4s
run ubuntu itests (bitcoind, backend=bitcoind cover=1)	11m 17s
run ubuntu itests (bitcoind-notxindex, backend="bitcoind notxindex")	11m 8s
run ubuntu itests (bitcoind-rpcpolling, backend="bitcoind rpcpolling" cover=1)	10m 0s
run ubuntu itests (bitcoind-etcd, backend=bitcoind dbbackend=etcd)	11m 9s
run ubuntu itests (bitcoind-postgres, backend=bitcoind dbbackend=postgres)	11m 5s
run ubuntu itests (bitcoind-sqlite, backend=bitcoind dbbackend=sqlite)	9m 32s
run ubuntu itests (bitcoind-postgres-nativesql, backend=bitcoind dbbackend=postgres nativesql=true)	10m 9s
run ubuntu itests (bitcoind-sqlite-nativesql, backend=bitcoind dbbackend=sqlite nativesql=true)	6m 5s
run ubuntu itests (neutrino, backend=neutrino cover=1)	5m 23s
finish	5s
	3h 19m 46s

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