FArchive broke operator<< for bool in Editor builds

Looks like CL-3215392 added changes in FArchive where the operator<< method for bool is a member operator in Editor (as opposed to a global operator in non-editor and old builds).

This causes shadowing issues so subclasses that implement additional operator<< methods, or override existing ones will break compilation.

Some classes (like FMemoryArchive) get around this with `using FArchive::<<`.

Should probably investigate to see all the classes this could affect.

1. Add the below code to any class in QAGame
2. Attempt to compile QAGame

static void Test()
{
    TArray<uint8> ObjectBytes;
    FMemoryWriter MemoryWriter(ObjectBytes, true);
    FObjectAndNameAsStringProxyArchive test(MemoryWriter, false);

    bool testBool = false;
    test << testBool;
}

Expected: The compile succeeds.
Actual: The compile fails with: `error C2679: binary '<<': no operator found which takes a right-hand operand of type 'bool' (or there is no acceptable conversion)`