upgrade: fix spurious certmonger re-tracking
The search for the HTTP Certmonger tracking request uses an
incorrect parameter ('key-storage'), triggering removal and
recreation of tracking requests on every upgrade. Replace
'key-storage' with the correct parameter, 'key-file'.
Part of: https://pagure.io/freeipa/issue/7991
Reviewed-By: Rob Crittenden <rcritten@redhat.com>