EntityClass cannot be used as expected

**UE4 Version**
All

**SkookumScript Version**
All

**Describe the bug**
The usage of `EntityClass` for `&blueprint` annotated functions is inconsistent. It should accept other variables of type EntityClass.

**To Reproduce**
Steps to reproduce the behavior:
1. Create a bp annotated function that takes an `EntityClass`
2. Create a variable of type EntityClass and note that you cannot pass it to the function

**Additional context**
Looks like there may be a missing link here, the reflection of class references to sk have no type information, so an class reference of type Pawn and a class reference of type GameMode both come in as `EntityClass`.

Reproduce the issue with a UE4 blueprint-annotated function accepting EntityClass and a variable of that type. Trace the reflection of class references into SkookumScript, then verify that compatible EntityClass variables can be passed and that the available class type information is handled consistently.

Written by the indexing model from the issue text.