Possibility to define dnsConfig section

[vozarea]

What would you like to be added

I would like to add possibility to define dnsConfig section for pod(s) - minimally to define searches.

Something like (for version 1.27.4):
ca.yaml (on line 170)

      {{- if and .Values.dnsConfig .Values.dnsConfig.searches }}
      dnsConfig:
        searches:
        {{- range .Values.dnsConfig.searches }}
          - {{ . }}
        {{- end }}
      {{- end }}

Why this is needed

I use AKS cluster connected to Azure VNET and running step-ca in it not only for this cluster, but also for another systems running on the same or other VNETs. In cluster I use Core DNS with customization to be able to reach internal domain names (but only FQDN, if we want to preserve internal AKS DNS resolving). But then, if we try to create certificate via HTTP-01 for our non-fqdn domains, it fails (because internal AKS DNS cannot translate it).

This fix/update solves our problem.

Thanks.