storage: fs: Process backing store data in virStorageBackendProbeTarget
storage: fs: Process backing store data in virStorageBackendProbeTarget

Move the processing of the backend metadata directly to the helper
instead of passing it through arguments to the function.

jardasgit/libvirt,crobinso/libvirt,eskultety/libvirt,libvirt/libvirt,libvirt/libvirt,rlaager/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,jfehlig/libvirt,taget/libvirt,jardasgit/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,VenkatDatta/libvirt,crobinso/libvirt,zippy2/libvirt,rlaager/libvirt,zippy2/libvirt,datto/libvirt,agx/libvirt,elmarco/libvirt,andreabolognani/libvirt,olafhering/libvirt,jfehlig/libvirt,rlaager/libvirt,andreabolognani/libvirt,datto/libvirt,olafhering/libvirt,elmarco/libvirt,crobinso/libvirt,shugaoye/libvirt,elmarco/libvirt,rlaager/libvirt,jardasgit/libvirt,eskultety/libvirt,rlaager/libvirt,datto/libvirt,olafhering/libvirt,eskultety/libvirt,VenkatDatta/libvirt,VenkatDatta/libvirt,nertpinx/libvirt,libvirt/libvirt,zippy2/libvirt,datto/libvirt,taget/libvirt,taget/libvirt,libvirt/libvirt,nertpinx/libvirt,crobinso/libvirt,elmarco/libvirt,datto/libvirt,jardasgit/libvirt,elmarco/libvirt,shugaoye/libvirt,andreabolognani/libvirt,eskultety/libvirt,agx/libvirt,taget/libvirt,eskultety/libvirt,zippy2/libvirt,agx/libvirt,nertpinx/libvirt,andreabolognani/libvirt,nertpinx/libvirt,agx/libvirt,VenkatDatta/libvirt,shugaoye/libvirt,shugaoye/libvirt,jfehlig/libvirt,andreabolognani/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,olafhering/libvirt,nertpinx/libvirt,agx/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,shugaoye/libvirt,taget/libvirt