
Since reuse is the default now, `--reuse-deps` can be confusing, as it technically does not imply roots are fresh. So add `--fresh-roots`, which is also easier to discover when running `spack concretize --fre<tab>`
Since reuse is the default now, `--reuse-deps` can be confusing, as it technically does not imply roots are fresh. So add `--fresh-roots`, which is also easier to discover when running `spack concretize --fre<tab>`