Follow-up from "Cmake cmp0115 warnings"
The following discussion from !7677 (merged) should be addressed:
TestVTKMImplicitDataArray.cxxhasn't been actually built in a while due to a missed extension in the
CMakeLists.txtfile. It doesn't compile today because it's probably been ignored for so long. Could one of you provide a diff I can add to this MR?