Port away from deprecated Plasma::QueryMatch::setType()
Did the commits before checking if the kf6 port MR actually touches the code, as I only remembered that the app/plasma subdir is not entered due to not found kf6plasma (being now libplasma).
But actually !522 does touch the krunner plugin, so this will be in conflict.
Then this made me spot a potential hickup in that other port which just dropped setting the type, while the deprecation warnings on KF5 build hint that actually there is a replacement property to be set instead, as done in this patch.
Not sure how to best continue here, so just leaving here for people to decide what to do.