syscall: fix sycall.ptrace cause nosplit stack over 792 byte limit

Fixes #54291

Author: cuiweixie

src/syscall/ptrace_darwin.go

@@ -6,9 +6,4 @@
 
 package syscall
 
-// Nosplit because it is called from forkAndExecInChild.
-//
-//go:nosplit
-func ptrace(request int, pid int, addr uintptr, data uintptr) error {
-	return ptrace1(request, pid, addr, data)
-}
+var ptrace = ptrace1