Consider using Cloudwatch Variables for Application ID

[AlJohri]

Cloudwatch Variables are now GA and have full CDK support.

It would be great to use a CFN Variable for Application ID where the Stack Parameter is optional and that just sets the default value.

This way a user can continue using the same stack + dashboard to monitor multiple EMR Serverless Applications.

[dacort]

Oh awesome, missed that! Would love to add this in.