[kube-prometheus-stack] Allow additional annotations for CRDs

[Daniel2000815]

Is your feature request related to a problem ?

In relation to this old closed issue, installing a separate chart for this simple feature seems a bit overkill, and having this implemented in the main chart would be helpful in many use cases, like the one mentioned in the issue, enabling server side apply, etc.

Describe the solution you'd like.

In values.yaml:

crds:
    annotations: {}

In CRDs manifests:

metadata:
  annotations: {{ toYaml .Values.crds.annotations | nindent 4 }}

Describe alternatives you've considered.

Use prometheus-operator-crds chart, but like I mentioned, the main chart would benefit from this feature.

Additional context.

No response