security/krb5-118: CVE-2022-42898: IGNORE and accelerate removal

krb5-118 was desupported by MIT when krb5-120 was released. CVE-2022-42898
now requires its accelerated removal from the tree. It is now
flagged IGNORE until its removal on Nov 30, 2022.

Security: CVE-2022-42898
(cherry picked from commit c49050564ffcf36e155344562f594e15b82a5194)