[Helm] Event-tailer complaining about null values for image

[sebastiangaiser]

Describe the bug:
When deploying the event-tailer via Helm using the following values:

eventTailer:
  enabled: true
  name: kubernetes

Helm renders this as:

---
apiVersion: logging-extensions.banzaicloud.io/v1alpha1
kind: EventTailer
metadata:
  name: kubernetes
spec:
  controlNamespace: logging
  image:
    repository:      # is null
    tag:             # is null
    pullPolicy:      # is null
    imagePullSecrets: []
  positionVolume:
    pvc:
      spec:
        resources:
          requests:
            storage: 1Gi
        volumeMode: Filesystem
        accessModes:
          - ReadWriteOnce

Every key under .spec.image is set to null by this which causes errors, e.g. when deploying via Flux.
The "problem" might be the toYaml from

logging-operator/charts/logging-operator/templates/logging/eventtailer.yaml

Line 11 in c92ffdb

{{- toYaml . | nindent 4 }}

I added a kustomize patch as a workaround to remove the entire .spec.image block and it works again.

A possible solution would be to make everything under .spec.image a comment in the values or do the with magic for each key. Please let me know about your thoughts, then I'm fine with opening a PR for it.

Expected behaviour:
Install should work out of the box as described in https://kube-logging.dev/docs/configuration/extensions/kubernetes-event-tailer/

/kind bug