Build a custom GitHub Action for config-lint

[kmonihen]

Look at creating a custom GitHub Action for config-lint.

Resources: https://github.com/actions/toolkit https://help.github.com/en/actions/building-actions/creating-a-docker-container-action

[kmonihen]

Also consider creating an Azure DevOps custom extension, which should be very similar to the GitHub Action. We'd just need an Azure marketplace account to publish to.

[oshaughnessy]

For reference: https://github.com/stelligent/cfn_nag/pull/429