* Add universal build_type variant to CMakePackage
* Override build_type in some packages with different possible values
* Remove reference to no longer existent debug variant
* Update CBTF packages with new build_type variant
* Keep note on build size of LLVM
* Removing the nobuild, nolink, and alldeps dependency types in favor of being explicit.
* This will help with maintenance going forward, as adding more dependency types won't affect existing declared dependencies in weird ways.
* default deptype is still `('build', 'link')`
* Adding last version of fenics and making trilinos not ambiguous on hdf5
* forcing fenics to ignore hdf5 cxx
* Adding deptypes and correcting the hdf5 patch
* flake8 corrections
* cleaning some useless code
