generator output doesn't include result and reason by default for all packages

[damntrecky]

Is your feature request related to a problem? Please describe.
The general discussion is that IntelliJ does not add reason and result to its overloaded definitions output. Same for Visual Studio. For VSCode you can use run or emit reason and resultWITHOUT explicitly defining those fields in thecommonDefinitions.json`

Describe the solution you'd like
I would like to not have to define reason or result in commonDefinitions.json since these fields are considered essential and required by the AWS Toolkit team.

Describe alternatives you've considered

1. Explicitly define result and reason in commonDefinitions.json.

Additional context
tbd