Add extraObjects to Helm chart values

[pravorskyi]

The chart supports extraVolumes and extraVolumeMounts, but if I need to mount a ConfigMap or Secret, I have to create it separately outside the chart.

It would be nice to have extraObjects in the chart values, similar to how many other Helm charts handle this (e.g. Bitnami charts), so I can define those resources in the same Helm release.

 extraObjects:   
    - apiVersion: v1
      kind: ConfigMap
      metadata:
        name: my-config
      data:
        app.conf: |
          something here

  extraVolumes:
    - name: my-config
      configMap:  
        name: my-config

  extraVolumeMounts:
    - name: my-config
      mountPath: /etc/app.conf
      subPath: app.conf
      readOnly: true

Without this, I have to manage the ConfigMap outside of Helm, which is annoying and means it doesn't get cleaned up with helm uninstall.

[famfop]

+1 from our side. We currently have an extra helm chart including some sealedsecrets and cn-pg (and some other ressources). It would be much much much simpler just being able to customize as suggested!