Should we discard `vtkm/cont/testing/Testing.h` and have just `vtkm/testing/Testing.h`
This is inspired by @kmorel's comment here: !1280 (comment 425742)
...The reason there are two
Testing.h
s was originally so that the things that ran exclusively in the execution environment could be tested without worrying whether they rely on something in the control environment (which they should not). Maybe that’s not as important as was originally thought (or perhaps originally was). Maybevtkm/cont/testing/Testing.h
should be deprecated and everything put invtkm/testing/Testing.h
?