Make ReflectionEnumProperty::getValue() return the enum

[simPod]

UoW compares orig and actual value. Orig value is the enum. But without this change, actual value is the inner value of the BackedEnum. Therefore, Entities with enum field are always considered a change.

So I though about it like this:

1. the orig and actual values MUST be enums so they're comparable – implies that property must return enum as a value and not the backed value.
2. I've found out the enumType is not filled when hydrating entity.

Resolves #10124, #10125.

[simPod]

Maybe I'm fighting against 10074