make a dataspecs positivity plot and update compfits report to use it
Created by: wilsonmr
closes #596 (closed)
example: https://vp.nnpdf.science/0vGt_IumTVKz5fLrR52jow==
is this what you had in mind @Zaharid ? I read your comments on the issue a few times and it still hurt my head but my interpretation was the matched_positivity_from_dataspecs
was fine but we needed to collect over dataspecs properly inside of that for the plot, not use a with loop in report and take pdfs from outside of dataspecs