Update minimum compiler version checks

[PhilMiller]

Compilers not supported by current Kokkos, and/or not supporting C++17 have been dropped from CI. Update the CMake compiler version checks to match.

We may want to hold off on doing this until downstream vt, EMPIRE, etc are ready to make this leap themselves.

For some of the compiler IDs, it may be sufficient to simply tell CMake that we require C++17 support, rather than specifically checking versions ourselves.