fish: add version 3.1.0 and switch to cmake (#15812)
fish: add version 3.1.0 and switch to cmake (#15812)

Versions < 3 do not support building with CMake.
iulian787/spack,LLNL/spack,iulian787/spack,iulian787/spack,LLNL/spack,LLNL/spack,LLNL/spack,iulian787/spack,iulian787/spack,LLNL/spack