v3d/v3dv: use NIR_PASS(_, ...) and other misc patches

The core of this MR is doing for v3dv/v3dv the equivalent to intel !17014 (merged). When doing that we got some nir_metadata related asserts, that meant that nir_metadata_preserve was not called on some points, so this MR fixes that.

Finally, the MR include some other v3dv misc patches, just to avoid creating a new MR.