Feature request: Support FailOnWarnings for AWS::Serverless::Api

[Slooz]

Describe your idea/feature/enhancement

Support FailOnWarnings for AWS::Serverless::Api

[torresxb1]

Thanks for the feature request! We have a roadmap here, but we also try to take in popular feature requests based on 👍 from the community. We will be adding this to our intake for prioritization.
Also, feel free to submit a PR for this and the team could get that reviewed!