use Access() instead of Lstat() for frequent use (#11911)

using Lstat() is causing tiny memory allocations,
that are usually wasted and never used, instead
we can simply uses Access() call that does 0
memory allocations.

cmd/os-readdir_windows.go

@@ -24,6 +24,11 @@ import (
 	"syscall"
 )
 
+func access(name string) error {
+	_, err := os.Lstat(name)
+	return err
+}
+
 // Return all the entries at the directory dirPath.
 func readDir(dirPath string) (entries []string, err error) {
 	return readDirN(dirPath, -1)