ntfs: support persistent noatime attribute

NTFS currently rejects FS_NOATIME_FL in its fileattr setter. This prevents
users from disabling automatic access-time updates on individual files or
directories with chattr +A.

Store noatime in bit 3 of the private $LINUXFLAGS EA and restore S_NOATIME
when loading an inode. Report and accept FS_NOATIME_FL in the fileattr
callbacks, updating the in-memory flag only after the EA update succeeds.
The VFS then suppresses automatic atime updates for the inode, while
chattr -A restores the mount's atime policy.

Document the new on-disk bit and that newly created children do not inherit
the attribute.

Suggested-by: Baolin Liu <liubaolin@kylinos.cn>
Reviewed-by: Baolin Liu <liubaolin@kylinos.cn>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Xuewen Wang <wangxuewen@kylinos.cn>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

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