Resolves#31782
With this change, if a spec is concrete after parsing (e.g. spec.yaml
or /hash-based), then it is not disambiguated (a process which requires
(a) that the spec be installed and (b) that it be part of the
currently-active environment).
This commit allows you to:
* Diff specs from an environment regardless of whether they have
been installed (more useful for projection/matrix-based envs)
* Diff specs read from .yaml files which may or may not be entirely
different installations of Spack
Co-authored-by: Massimiliano Culpo <massimiliano.culpo@gmail.com>
b594c0aee0