glspirv: Enable the new deref-base UBO/SSBO path on gl_spirv

glspirv: Enable the new deref-base UBO/SSBO path on gl_spirv

Among other things, it supports arrays of arrays of UBO/SSBO (default
codepath doesn't).

Acked-by: Timothy Arceri <tarceri@itsqueeze.com>
v2: nir_address_format_vk_index_offset got renamed to
    nir_address_format_32bit_index_offset (after rebase against master)

v3: the ptr_type fields in spirv_to_nir_options got changed to be of
    type nir_address_format.

v4: remove phys_ssbo_addr_format and push_const_addr_format as they are
    not used by glspirv

Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>