rbd: Use assume_storage_prezeroed when formatting

Instead of passing lazy_itable_init=1 and lazy_journal_init=1 to
mkfs.ext4, pass assume_storage_prezeroed=1 which is
stronger and allows the filesystem to skip inode table zeroing
completely instead of simply doing it lazily.

Closes: ceph#4948

Signed-off-by: Niraj Yadav <[email protected]>

internal/rbd/nodeserver.go

@@ -101,7 +101,7 @@ var (
 	xfsHasReflink = xfsReflinkUnset
 
 	mkfsDefaultArgs = map[string][]string{
-		"ext4": {"-m0", "-Enodiscard,lazy_itable_init=1,lazy_journal_init=1"},
+		"ext4": {"-m0", "-Enodiscard,assume_storage_prezeroed=1"},
 		"xfs":  {"-K"},
 	}