Support imagePullSecrets in mattermost-enterprise-edition

[yeongeon]

We need to define for imagePullSecrets at mattermost-enterprise-edition helm as below.

    spec:
      {{- with .Values.mattermostApp.image.imagePullSecrets }}
      imagePullSecrets:
        {{- toYaml . | nindent 8 }}
      {{- end }}

[bjorns163]

This is not only needed in enterprise-edition but also in the teams edition

[bjorns163]

By the way in your values files you can just do:

extraInitContainers:
  imagePullSecrets:
    - name: your-pull-secret