graphics/rigsofrods-pagedgeometry: Rename to graphics/pagedgeometry, switch upstream with fix build with ogre3d 1.14

The version of pagedgeometry from rigsofrods seems to lagg behind the
one from OGRECave. Since looking at the current build dependencies of
rigsofrods, it appears that they are using pagedgeometry from OGRECave
instead of their own fork.

PR: 287838