ext4: show the default enabled i_version option

Display `i_version` in `/proc/fs/ext4/sdx/options`, even though it's
default enabled. This aids users managing multi-version scenarios and
simplifies debugging.

Signed-off-by: Baokun Li <libaokun1@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://patch.msgid.link/20250703073903.6952-1-libaokun@huaweicloud.com


Signed-off-by: Theodore Ts'o <tytso@mit.edu>