* Add test for optional enums in Kotlin * Rename optional_scalars2.fbs into optional_scalars.fbs Also updated all references in the project to point to "optional_scalars.fbs" instead of "optional_scalars2.fbs".
* CMakeLists: also really generate optional_scalars as needed by test elsewhere * [C++] Handle fixed-length array in minireflection Fixes #6128