[Lxqt] Upcoming release/Qt6 Support

So there is no release date, as of yet for the next release of LXQt, but it looks like we're going to run into the same issue that the KDE team does. In so far as We're going to need to keep the Qt5 versions around, for leap, but have Qt6 from upstream for Tumbleweed. How do we want to approach this? Rename the packages that can't be co-installed to -qt5 and -qt6 variants? That's what I've done so far in X11:LXQt:qt6, but this isn't really a call I want to make on my own.