krunner: install desktop file to kglobalaccel as program
Fixes KRunner failing to launch from shortcut because service file is not executable.
From @nicolasfella :
ApplicationLauncherJob only executes desktop files if they are in share/applicatons, root owned, or +x
kglobalacceld/kio therefore does +x on the files if needed
Here it can't do that because the file is not writable
But it's not root owned either