* 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
* new package: CLAMR
* changed from bool variants to single value variants and corresponding logic in build_type and cmake_args
* lowercase variant values
* updated conditionals for variants
* adjusted url and docstring
