Merge pull request #35566 from rootfs/fix-mount

Automatic merge from submit-queue

add IsNotMountPoint() to mount_unsupported.go

fix the cross build issue

pkg/util/mount/mount_unsupported.go

@@ -57,3 +57,7 @@ func (mounter *SafeFormatAndMount) formatAndMount(source string, target string,
 func (mounter *SafeFormatAndMount) diskLooksUnformatted(disk string) (bool, error) {
 	return true, nil
 }
+
+func IsNotMountPoint(file string) (bool, error) {
+	return true, nil
+}