chore: create action to auto-label extension and linting issues

[straker]

With the new issue forms, we can now auto-assign opened issues with the extension or linting labels based on the Product dropdown. It was difficult to figure out the proper matching of newline characters.

You can see it working https://github.com/straker/issue-template-tests/issues and https://github.com/straker/issue-template-tests/actions