radv: Fix TCS output counts for ESO.
NIR patch_outputs_written doesn't include tess levels, but we need to count them among per-patch outputs. According to radv_map_io_driver_location, slot 0 is outer, slot 1 is inner tess level.
This MR fixes how num_linked_outputs
/ num_linked_patch_outputs
are counted for ESO TCS.
Also exclude tess levels from the per-vertex output mask.