The loop restoration filter needs the dimensions of the non-padded
frame, that only FrameInvariants knows.

On construction, RestorationState created a clipped version of the
PlaneConfigs, that was used in lrf_filter_frame() to get the non-padded
dimensions.

Instead, directly pass &FrameInvariants to lrf_filter_frame().

This paves the way to remove clipped_cfg from RestorationState entirely,
to simplify tiling.