fix #4846: Avoid the outdated noacl mount option on ext4

fix #4846: Avoid the outdated noacl mount option on ext4

Do not use the 'noacl' mount option when mounting a container disk with
an ext4 file system. The option was deprecated in kernel commit
f70486055ee3 ("ext4: try to deprecate noacl and noxattr_user mount
options") (v3.4) as it no other filesystem exposed disabling ACL as
mount option, and then finally got removed in commit 2d544ec923db ("ext4:
remove deprecated noacl/nouser_xattr options") (v6.1).

Signed-off-by: Filip Schauer <f.schauer@proxmox.com>
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>