microsoft/compiler: Add support for get_ssbo_size to translator
Reusing emit_texture_size
as DXIL uses the same dx.op.getDimensions
intrinsic for both textures and SSBOs. Also, this changes depends on the fact that use_deref_buffer_array_length
combined with nir_lower_explicit_io
will create a get_ssbo_size
intrinsic that takes in the result from load_vulkan_descriptor
instead of vulkan_resource_index
.