Implement compilation and execution of new test syntax

[tstirrat15]

Part of #2127

Once the parser is implemented, we'll need to use those AST nodes. My best guess of how this will work:

1. Implement translator logic to turn those nodes into internal representations
2. Construct a dev context using those representations and attach it to the compiled schema
3. Add logic to execute the validations attached to the compiled schema

I think there's probably a conversation to be had about when/where the validations are to be run.