fsnotify, lsm: Decouple fsnotify from lsm

Currently, fsnotify_open_perm() is called from security_file_open().
This is a a bit unexpected and creates otherwise unnecessary dependency
of CONFIG_FANOTIFY_ACCESS_PERMISSIONS on CONFIG_SECURITY. Fix this by
calling fsnotify_open_perm() directly.

Signed-off-by: Song Liu <song@kernel.org>
Acked-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://patch.msgid.link/20241013002248.3984442-1-song@kernel.org