nfiguration's
Secret exists, but it is the responsibility of the user to provide the raw
gzipped Prometheus configuration under the `prometheus.yaml.gz` key.
This behavior is *deprecated* and will be removed in the next major version
of the custom resource definition. It is recommended to use
`spec.additionalScrapeConfigs` instead.

Note that the ScrapeConfig custom resource definition is currently at Alpha level.²