DRW: New High Quality Normal & Tangent extract

This patch adds a dedicated path to extract 16bit normals instead of packing them into 10bits/comp.
The tangents are also packed to 10bits/comp if not using the new High Quality Normal option.

Fix T61024 Degraded texture shading on dense meshes

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D6614

source/blender/draw/intern/draw_cache_impl_mesh.c

@@ -1341,6 +1341,7 @@ void DRW_mesh_batch_cache_create_requested(
                                        true,
                                        false,
                                        &cache->cd_used,
+                                       scene,
                                        ts,
                                        true);
   }
@@ -1355,6 +1356,7 @@ void DRW_mesh_batch_cache_create_requested(
                                        false,
                                        use_subsurf_fdots,
                                        &cache->cd_used,
+                                       scene,
                                        ts,
                                        true);
   }
@@ -1368,6 +1370,7 @@ void DRW_mesh_batch_cache_create_requested(
                                      false,
                                      use_subsurf_fdots,
                                      &cache->cd_used,
+                                     scene,
                                      ts,
                                      use_hide);