Add an option to disable github plan/apply/policy_check comments for a workflow

[anryko]

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• I'd be willing to implement this feature (contributing guide)

Describe the user story

I have dozens of Atlantis servers running (one per cloud account) and in some cases, the Terraform change has to be processed by all of them. This causes a lot of comment noise in the GitHub PR thread. I would like to rely solely on the GitHub status checks in those cases.

Describe the solution you'd like

It would be helpful to have an ENV VAR like ATLANTIS_SILENCE_COMMENTS=true (or something more flexible e.g. ATLANTIS_SILENCE_COMMENTS=plan,apply, ATLANTIS_SILENCE_COMMENTS=all), which could be set globally or per workflow step to stop Atlantis from posting comments to the GH PR thread, but leave the GH status_check behavior unchanged.

Describe the drawbacks of your solution

None.

Describe alternatives you've considered

Tried using the workflow step run command output: hide option. It disables the Terraform output but the minimal comment with the atlantis apply|unlock instructions is still posted to GH PR thread.

[3bbbeau]

Thanks for posting this @anryko , it seems like we had somewhat similar thoughts on having more control over silencing comments.

#4388

I think my feature request above would fall under here instead as yours is more generic, e.g. ATLANTIS_SILENCE_COMMENTS=plan,apply,multienv