Add "support request" label with automation to explain how to file an effective support case

When there is an issue file and it does not appear to be a bicep-specific issue, we usually ask the customer to file a support request. It would be handy if we could automate this workflow such that when the the label "support request" was added, a bot added a comment detailing how to file an effective support request (i.e. get the correlation ID)

No files or tests are named. Start by locating existing issue-label or bot automation in the repository; done means that adding the "support request" label posts guidance for filing an effective support case, including obtaining the correlation ID.

Written by the indexing model from the issue text.