Add an option to fail on a skipped check

### Details

We have a scenario where we want to skip a certain check for the development environment but not for stage and production. With the current setup (as I understand it from looking at the code here [link](https://github.com/github/branch-deploy/blob/d1f158e5cd122a1db00e8ba49044134fd641ae21/dist/index.js#L44046C9-L44046C29)) skipped check is considered healthy. It would be convient for us to have an option like skipped_checks: true/false (fail if it is set to false as we would like it to be here)

Start with the skipped-check handling in dist/index.js at the linked location, then trace how check results and configuration options are parsed and evaluated. Confirm how an option such as skipped_checks would affect deployment checks, and verify that skipped checks can be treated as failures where configured without changing the existing default behavior.

Escrito por el modelo de indexación a partir del texto del issue.