denylist: enable coreos.boot-mirror.luks test

Can not reproduce coreos.boot-mirror.luks failed issue locally after
running 20 times, remove from denylist to see if it happens.

See coreos/fedora-coreos-tracker#1092

Author: HuijingHei

kola-denylist.yaml

@@ -41,11 +41,6 @@
   snooze: 2022-02-14
   streams:
     - rawhide
-- pattern: coreos.boot-mirror.luks
-  tracker: https://github.com/coreos/fedora-coreos-tracker/issues/1092
-  snooze: 2022-02-14
-  streams:
-    - rawhide
 - pattern: ext.config.chrony.dhcp-propagation
   tracker: https://github.com/coreos/fedora-coreos-tracker/issues/1097
   snooze: 2022-02-21