Use anongit (over https) instead of invent.kde.org

4f633bf3 replaced git://anongit with https://invent, but to do that
change we would also need to add the group name to every repository, eg.
replace kde:extra-cmake-modules with kde:frameworks/extra-cmake-modules.

Go back to using anongit, but over https: instead of git:, so old
repository paths can keep working.
2 jobs for master
Status Job ID Name Coverage
  Build
manual #51052
docker allowed to fail manual
kdeorg/appimage-base
manual #51053
docker allowed to fail manual
kdeorg/staticweb