Fix prometheusrule failures.
"The PrometheusRule “autogenerated-saturation” is invalid: metadata.annotations: Too long: must have at most 262144 bytes"
Example of a failed set of pipelines:
https://ops.gitlab.net/gitlab-com/runbooks/-/jobs/10984339
Looks like it's been broken for at least a week or two.
https://ops.gitlab.net/gitlab-com/runbooks/-/jobs?statuses=FAILED