* add InteropScopeTests.kt (wip)

* add InteropScopeTests.kt (wip - 2)

* add InteropScope tests for `withResult`

* move TestHelpers to test sources + include them in not-release builds

* add interop tests for ShortArray, IntArray, DoubleArray

* update branch after rebase
Co-authored-by: Oleksandr Karpovich <oleksandr.karpovich@jetbrains.com>