Newer spack and spack load #270
Description
On my desktop I usually run bleeding edge spack to test things there as well.
Generally, we should be prepared to upgrade spack from time to time to get support for newer OSes (macos 11?) and base packages.
spack 0.14 switched spack load from using environment-modules to an internal method of modifying the ennvironment. That internal method is not customizable currently.
There are some bad side effects. Like LD_LIBRARY_PATH is getting each and every directory (see spack/spack#3955 (comment)).
We might look into spack module {tcl,lmod} loads FOO or look deeper into lmod integration.