routerrpc: fix estimateroutefee for public route hints #17364

Job	Run time
RPC and mobile compilation check	2m 23s
lint code	1m 20s
check commits	7m 26s
cross compilation (i386, freebsd-386 linux-386 windows-386)	9m 54s
Sqlc check	3m 38s
sample configuration check	1m 31s
cross compilation (amd64, darwin-amd64 freebsd-amd64 linux-amd64 netbsd-amd64 openbsd-amd64 windo...	11m 58s
cross compilation (arm, darwin-arm64 freebsd-arm linux-armv6 linux-armv7 linux-arm64 windows-arm)	11m 57s
run unit tests (btcd unit-cover)	2m 52s
run unit tests (unit tags="kvdb_etcd")	1m 36s
basic itests (btcd, backend=btcd cover=1)	8m 11s
run unit tests (unit tags="kvdb_postgres")	1s
check pinned dependencies (google.golang.org/grpc v1.59.0)	8s
basic itests (bitcoind, backend=bitcoind cover=1)	8m 40s
run unit tests (unit tags="kvdb_sqlite")	4s
check pinned dependencies (github.com/golang/protobuf v1.5.3)	7s
basic itests (bitcoind-notxindex, backend="bitcoind notxindex")	8m 16s
run unit tests (btcd unit-race)	1m 57s
basic itests (neutrino, backend=neutrino cover=1)	5m 26s
run unit tests (unit-module)	1s
itests (bitcoind-rpcpolling, backend="bitcoind rpcpolling")	1s
macOS itest	18m 51s
itests (bitcoind-etcd, backend=bitcoind dbbackend=etcd)	1s
windows itest	23m 18s
itests (bitcoind-sqlite, backend=bitcoind dbbackend=sqlite)	1s
itests (bitcoind-sqlite-nativesql, backend=bitcoind dbbackend=sqlite nativesql=true)	1s
check release notes updated	1s
itests (bitcoind-postgres, backend=bitcoind dbbackend=postgres)	1s
itests (bitcoind-postgres-nativesql, backend=bitcoind dbbackend=postgres nativesql=true)	1s
finish	5s
	2h 9m 47s

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