feat(ces): add alarmrule

[gaetanars]

Description of your changes

I have:

• [x] Run make reviewable test to ensure this PR is ready for review.

How has this code been tested

❯ k get managed
NAME                                                             READY   SYNCED   EXTERNAL-NAME              AGE
alarmrule.ces.flexibleengine.upbound.io/example-ces-alarm-rule   True    True     al1674030133954Y084Qw81o   3m

NAME                                                    READY   SYNCED   EXTERNAL-NAME                                                          AGE
topic.smn.flexibleengine.upbound.io/example-smn-topic   True    True     urn:smn:eu-west-0:6f9b3db803e6449e8dce83e566aac41b:example-smn-topic   3m21s