msitools: 0.97 -> 0.98

* msitools: 0.97 -> 0.98 (#52188)

Semi-automatic update generated by
https://github.com/ryantm/nixpkgs-update tools. This update was made
based on information from
https://repology.org/metapackage/msitools/versions

* msitools: fetch from Gnome mirrors

+ misc cleanup