Eliminate type-ignore that's generated for enums (allowing us to eliminate warn_unused_ignores = False in mypy.ini)

[nipunn1313]

Per discussion in #214 - see if we can eliminate the type-ignore that's generated for enums

It exists to sidestep the circular dependency that our enum strategy creates. In order to use the alternate strategy of pulling the type definition up one level, we need type aliases to work within a class - see python/mypy#10788

[pcorpet]

mypy seems to manage the type properly and thus is raising a

error: unused "type: ignore" comment

Do you know a way for comments to only be used by pyright? or do you recommend to disable the warnings in mypy? (--no-warn-unused-ignores) although that would mean to remove it for all other warnings :-(

[nipunn1313]

The technique I used was to update mypy.ini via the same technique as in #237

[mypy-testproto.*]
warn_unused_ignores = False

It may be an unsatisfying method - hence this task here to help resolve permanently via some other means. #241 is likely a prereq to solving this.