Unqualified types in union variants can cause incorrect inference

[aajtodd]

Describe the bug

A model with a union type such as

union MyUnion {
    string: String
    foo: UnionMap
}

map UnionMap {
    key: String
    value: MyUnion
}

Will generate a sealed class like this:

sealed class MyUnion {
    class String(val value: kotlin.String): MyUnion()

     class Foo(val value: Map<String, MyUnion>): MyUnion()
}

This causes the generated type to be Map<MyUnion.String, MyUnion> instead of the intended Map<kotlin.String, MyUnion>. Unions are already generated as fully qualified for similar issues we've seen in the past. It would seem we need to fully qualify generic bounds as well.

Expected Behavior

The map generic types need to be fully qualified as well:

sealed class MyUnion {
    class String(val value: kotlin.String): MyUnion()

     class Foo(val value: Map<kotlin.String, com.package.model.MyUnion>): MyUnion()
}