Splunk Operator: Document and add support via helm for operator to use proxy

[araman-m]

Please select the type of request

Enhancement

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It is currently not documented how Splunk Operator can leverage a proxy
it can be necessary for example to reach s3 bucket for app management purposes

Following discussions, the generic way to do it is via env variables
env: - name: HTTP_PROXY value: "http://your-proxy-server/:port" - name: HTTPS_PROXY value: "http://your-proxy-server/:port" - name: NO_PROXY value: "localhost,127.0.0.1,.your-domain.com"

and helm could look
env:
{{- range .Values.env }}
- name: {{ .name }}
value: {{ .value | quote }}
{{- end }}

[patrykw-splunk]

Hey @araman-m, I've merged #1490. I believe this resolve your issue.
I've added list extraEnvs to splunk-operator chart. The same functionality for splunk-enterprise already exist under extraEnv name