denylist: enable coreos.boot-mirror.luks test

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

See coreos/fedora-coreos-tracker#1092

Author: HuijingHei

kola-denylist.yaml

@@ -47,12 +47,6 @@
   streams:
     - rawhide
     - branched
-- pattern: coreos.boot-mirror.luks
-  tracker: https://github.com/coreos/fedora-coreos-tracker/issues/1092
-  snooze: 2022-02-14
-  streams:
-    - rawhide
-    - branched
 - pattern: ext.config.chrony.dhcp-propagation
   tracker: https://github.com/coreos/fedora-coreos-tracker/issues/1097
   snooze: 2022-02-21