Support additional CMake build system generators

[teojgo]

At the moment ReFrame makes the assumption that CMake will generate standard UNIX makefiles. We can generalize the behaviour by using build-generator agnostic commands:

cmake -B <builddir> -S <srcdir>
cmake --build <builddir>

This would generalize: #3101

[teojgo]

It is important to make sure that we don't break compatibility with what is happening now when the Cmake build system is used.