Add support for TPL_CASES with meta-generator

[jfalcou]

Sometimes, we want to use TTS_TPL_CASE but instead of passing a known list of types, the types list need to be generated by a meta-function.

We have to add support such a use case:

template<int N> struct all_array_of
{
  using type = types_<array<int,N>, array<float,N>>:
};

TTS_TPL_CASES2("The scenario", all_array_of<4>)

[jfalcou]

EVE requried something like that, we need to move it over there.

Current API:

EVE_TEST( "Check behavior of replace_ignored(keep_last)"
        , eve::test::simd::all_types
        , eve::test::generate ( eve::test::ramp(0), eve::test::ramp(100) )
        )
<typename T>(T data, T replacement)
{
   // the code
};