Cross-reference codegen code with BindingVersions

Generated code needs to assert compatibility with CodeHelpers as well as general layout yang-binding. Performing this check should be light-weight and centralized.

There are thjree entry points here:

1. ModuleInfo, which is accessed by runtime and by any interfaces which have a QNAME field
2. Builders, which are accessed by application code
3. Value wrapper classes, which are accessed by both

Each of these should capture BindingVersion.CURRENT at compile-time and issue callouts to BindingVersion checks at class initialization time.