Is your feature request related to a problem? Please describe.

Down the road we might want to use eccodes' grib_to_netcdf feature. In spack-stack 1.9.0 this does not get installed, even with the +tools variant.

Testing on my mac, when I reinstalled eccodes with spack install --add eccodes +netcdf I was then able to use grib_to_netcdf.

Describe the solution you'd like
Update packages.yaml for eccodes to:

    eccodes:
      require: '@2.33.0 +png +tools +netcdf'

Additional context
The netcdf variant is available in https://github.com/JCSDA/spack/blob/spack-stack-dev/var/spack/repos/builtin/packages/eccodes/package.py