Reorganize the job rules and the management-cluster-certificate alerts

[QuentinBisson]

Before adding a new alerting rule into this repository you should consider creating an SLO rules instead.
SLO helps you both increase the quality of your monitoring and reduce the alert noise.

• How to create a SLO rule: https://github.com/giantswarm/sloth-rules#how-to-create-a-slo
• Documentation: https://intranet.giantswarm.io/docs/monitoring/slo-alerting/

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This PR reorganizes the job and management-cluster certificate alerts to the correct teams.
This is a part of #1211

Checklist

• Update CHANGELOG.md
• Add Unit tests
• Follow Alert structure
• Consider creating a dashboard (guidelines) (if it does not exist already) to help oncallers monitor the status of the issue.
• Request review from oncall area, as well as team (e.g: oncall-kaas-cloud GitHub group).

[AndiDog]

What's up with the strange PR title / commit message format?

I'm not sure what is done here – the description says "reorganize", but this adds rules. Did you plan to move/rename existing rules, maybe (there's an existing file helm/prometheus-rules/templates/kaas/phoenix/alerting-rules/job.rules.yml, for example)?

[QuentinBisson]

Sorry @AndiDog you're right this was less than poorly explained :(

I edited the changelog and removed the old job file I forgot to remove so now the job.rules was moved to shared and not just created. Let me know if you have other questions :)

[AndiDog]

Minor comment, not sure if important. Rest looks good, thx!

[AndiDog]

Don't we need {{- if eq .Values.managementCluster.provider.kind "aws" }} as before? Or we're fine that cronjob="route53-manager" won't find anything on other MCs?

[QuentinBisson]

We're fine with it, this is just to make sure we do not deploy the rules on capa and other mcs because we do not need it. But it's UP to you. Let me know what you prefer :)

[QuentinBisson]

Oh, i misunderstood, we're fine with it because aws is the only remaining vintage provider (because KVM alerts are coming from a custom branch and azure is gone)