zink: bitcast extracted streamout components to uint before creating uvec

spirv can't create a uvec from float components, so pre-cast here

Reviewed-by: Dave Airlie <airlied@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17404>

src/gallium/drivers/zink/nir_to_spirv/nir_to_spirv.c

@@ -1651,6 +1651,7 @@ emit_so_outputs(struct ntv_context *ctx,
                    v = 1;
                    components[idx++] = spirv_builder_emit_composite_extract(&ctx->builder, get_uvec_type(ctx, 32, 1), val, &v, 1);
                 } else {
+                   components[idx] = emit_bitcast(ctx, spirv_builder_type_uint(&ctx->builder, 32), components[idx]);
                    idx++;
                 }
              }