runtime: Fix panic if newstack at runtime.acquireLockRank

The function named `acquireLockRank` at `src/runtime/lockrank_on.go`
with `go:nosplit`, but at `src/runtime/lockrank_off.go` without
`go:nosplit`. GOEXPERIMENT="" in default, process will panic if
newstack at runtime.acquireLockRank with `gcflags="all=-N -l"`.
Similarly, function `lockWithRank`, `unlockWithRank`, `releaseLockRank`
and `lockWithRankMayAcquire`.

Fixes golang#40843

src/runtime/lockrank_off.go

@@ -18,19 +18,24 @@ func getLockRank(l *mutex) lockRank {
 	return 0
 }
 
+//go:nosplit
 func lockWithRank(l *mutex, rank lockRank) {
 	lock2(l)
 }
 
+//go:nosplit
 func acquireLockRank(rank lockRank) {
 }
 
+//go:nosplit
 func unlockWithRank(l *mutex) {
 	unlock2(l)
 }
 
+//go:nosplit
 func releaseLockRank(rank lockRank) {
 }
 
+//go:nosplit
 func lockWithRankMayAcquire(l *mutex, rank lockRank) {
 }