GitHub Action to add/remove triage labels as-needed

[dbeatty10]

Description & motivation

What?

When the maintenance team triages, we sometimes need more information from the issue creator. In
those cases we remove the triage label and add the awaiting_response label. Once we
receive a response in the form of a comment, we want the awaiting_response label removed
in favor of the triage label so we are aware that the issue needs action.

Why?

To help with out team triage issue tracking

When?

This will run when a comment is added to an issue and that issue has the awaiting_response label.