s4:mit-kdb: Force canonicalization for looking up principals

s4:mit-kdb: Force canonicalization for looking up principals

See also
https://github.com/krb5/krb5/commit/ac8865a22138ab0c657208c41be8fd6bc7968148

Pair-Programmed-With: Andreas Schneider <asn@samba.org>
Signed-off-by: Isaac Boukris <iboukris@gmail.com>
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Alexander Bokovoy <ab@samba.org>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Mon Nov 29 09:32:26 UTC 2021 on sn-devel-184

(cherry picked from commit 90febd2a33b88af49af595fe0e995d6ba0f33a1b)

[jsutton@samba.org Removed MIT knownfail changes]