landlock: update landlock-lsm headers for api v5 and v6 in RHEL-9

JIRA: https://issues.redhat.com/browse/RHEL-94688

Customer request to update landlock-lsm headers to better match RHEL-10

Omitted-fix: 8d6650646ce4 ("bpf: syzkaller found null ptr deref in unix_bpf proto add")
Omitted-fix: 16b2f264983d ("bpf: sockmap, fix proto update hook to avoid dup calls")

Signed-off-by: Ryan Sullivan rysulliv@redhat.com