Rewrite dependency lister from - now produces *much* easier to read output

Rewrite dependency lister from - now produces *much* easier to read output

Knowing where a module came from is quite valuable, but the segmentation done
in cebc0cc8 makes it rather hard finding a particular module. Instead add
an extra prefix with shorthand "dirs of interest" names, and putput the entire
list in ci-alphabetical order.

Additionally make sure we explicitly print out our versions under CI (a silly
omission from earlier), and explicitly omit loading dist_* optdeps

While the diff is massive, the actual logic did not change in any significant
way.