Toolkit can debug template.yaml generated by CDK

> If the template.yaml file _contents_ don't look like a SAM file, Toolkit will skip it. What do the contents look like? Also, is the file part of the vscode workspace?

The file is generated by CDK and I can use it just fine via command line `sam local invoke ...`. But AWS Toolkit does not load it preventing me from using sam cli Debug Configuration. We are starting the sam local invoke debugger with a VS Code preLaunchTask and attaching to the debugger to workaround this problem but it would be nice for AWS Toolkit to support the same templates sam cli does

_Originally posted by @thefat32 in https://github.com/aws/aws-toolkit-vscode/issues/1395#issuecomment-1230650607_

Start by reproducing the issue with a CDK-generated template.yaml and compare AWS Toolkit handling with the working `sam local invoke ...` command. Check the VS Code preLaunchTask and SAM CLI Debug Configuration workaround; done means the Toolkit loads the generated template and supports its debug configuration directly.

Written by the indexing model from the issue text.