server: cursor_channel: releasing pipe items resources when the pipe is cleared (on disconnect)
server: cursor_channel: releasing pipe items resources when the pipe is cleared (on disconnect)

same as commit 74a9d10af96f4d7c8c1b1d7fca124a8df9180787 for cursor channel

alon/spice-server,freedesktop-unofficial-mirror/spice__spice,mathslinux/spice,freedesktop-unofficial-mirror/spice__spice,ya-mouse/spice,dezelin/spice,Fantu/spice,mathslinux/spice,alon/spice-server,fgouget/spice,fgouget/spice,SPICE/spice,freedesktop-unofficial-mirror/spice__spice,alon/spice-server,fgouget/spice,SPICE/spice,mathslinux/spice,fgouget/spice,Fantu/spice,alon/spice-server,freedesktop-unofficial-mirror/spice__spice,alon/spice-server,Fantu/spice,ya-mouse/spice,dezelin/spice,elmarco/spice,ya-mouse/spice,elmarco/spice,dezelin/spice,mathslinux/spice,dezelin/spice,elmarco/spice,freedesktop-unofficial-mirror/spice__spice,elmarco/spice,mathslinux/spice,SPICE/spice,elmarco/spice,dezelin/spice,Fantu/spice