Missing support for secret annotation

[jakubmalek]

The Kubernetes secret with users.toml currently does not support custom annotations.
Annotations such as avp.kubernetes.io/path are needed for ArgoCD Vault Plugin to replace secret value placeholders.

This way instead of using external secrets, the users can be safely configured something like this:

users:
  - name: foo
    password: `<foo-password>` # Vault placeholder

I propose to add

secret:
  annotations: {}

To the values.yaml end add:

{{- with .Values.secret.annotations }}
annotations:
  {{- toYaml . | nindent 4 }}
{{- end }}

To all Kubernetes secret templates.