Improve the performace of `LeaseOutput` #15327

Job	Run time
check commits	10m 24s
lint code	3m 19s
cross compilation	14m 5s
sample configuration check	21s
RPC and mobile compilation check	1m 27s
Sqlc check	19s
run unit tests (btcd unit-cover)	16m 50s
check pinned dependencies (google.golang.org/grpc v1.59.0)	4s
run unit tests (unit tags="kvdb_etcd")	18m 46s
run macOS itest	49m 23s
run unit tests (unit tags="kvdb_postgres")	17m 31s
check pinned dependencies (github.com/golang/protobuf v1.5.3)	4s
run unit tests (unit tags="kvdb_sqlite")	16m 54s
run unit tests (btcd unit-race)	35m 39s
run unit tests (unit-module)	1m 5s
run ubuntu itests (btcd, backend=btcd cover=1)	31m 18s
run ubuntu itests (bitcoind, backend=bitcoind cover=1)	37m 13s
run windows itest	33m 22s
check release notes updated	3s
run ubuntu itests (bitcoind-notxindex, backend="bitcoind notxindex")	36m 25s
run ubuntu itests (bitcoind-rpcpolling, backend="bitcoind rpcpolling" cover=1)	38m 37s
run ubuntu itests (bitcoind-etcd, backend=bitcoind dbbackend=etcd)	51m 29s
run ubuntu itests (bitcoind-postgres, backend=bitcoind dbbackend=postgres)	1h 10m 22s
run ubuntu itests (bitcoind-sqlite, backend=bitcoind dbbackend=sqlite)	40m 18s
run ubuntu itests (bitcoind-postgres-nativesql, backend=bitcoind dbbackend=postgres nativesql=true)	1h 8m 41s
run ubuntu itests (bitcoind-sqlite-nativesql, backend=bitcoind dbbackend=sqlite nativesql=true)	40m 23s
run ubuntu itests (neutrino, backend=neutrino cover=1)	35m 30s
finish	3s
	11h 9m 55s

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