nir/lower_io: Support global addresses for UBOs in nir_lower_explicit_io

nir/lower_io: Support global addresses for UBOs in nir_lower_explicit_io

For nir_address_format_64bit_global_32bit_offset and
nir_address_format_64bit_bounded_global, we use a new intrinsics which
take the base address and offset as separate parameters.  For bounds-
checked access, the bound is also included in the intrinsic.  This gives
the drive more control over the bounds checking so that UBOs don't
suddenly become massively more expensive.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8635>