community/kde-cli-tools: rework workaround for a circular dependency

To fix a circular dependency #11785 (closed) we previously let kde-cli-tools install itself when plasma-workspace was installed through a install_if. However that means that if there are 2 versions of kde-cli-tools available in the enabled repositories, in my case a Qt5 and a Qt6 one, the "old" one will keep pulling itself in which blocks installation of plasma-workspace (due to requiring both KF5 and KF6 packages at the same time, conflicting with each other).

plasma-workspace still depends on kde-cli-tools at runtime and kde-cli-tools still requires plasma-workspace for building, but now we just pull the dep in through plasma-desktop, plasma-mobile and plasma-bigscreen to fix this

Note that this circular dependency is resolved in the Qt6 builds so this won't be a problem in the future