[Feature] Add imagePullSecrets to omjob-operator and ingestion ServiceAccounts (Helm chart)

[Zarubenko]

Problem

The Helm chart does not attach imagePullSecrets to the ServiceAccounts created for
the OMJob operator and omjob-operator deployment, making it impossible to pull images from
private registries.

Solution

Add to values.yaml in chart:

omjobOperator:
  ...
  # Image pull secrets for private registries
  imagePullSecrets: []
  # - name: my-registry-secret

Add to omjob-operator-rbac.yaml and omjob-operator-deployment.yaml

 {{- if .Values.omjobOperator.imagePullSecrets }}
 imagePullSecrets:
 {{- toYaml .Values.omjobOperator.imagePullSecrets | nindent n }}
 {{- end }}```

[karthik120710]

hi @Zarubenko i would like to work on these issue .

[harishkotra]

Just submitted a PR for this: open-metadata/openmetadata-helm-charts#500