lavapipe: request correct sample mask behaviour

Fixes:
dEQP-VK.rasterization.frag_side_effect*

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7435>

src/gallium/frontends/lavapipe/lvp_execute.c

@@ -428,6 +428,7 @@ static void handle_graphics_pipeline(struct lvp_cmd_buffer_entry *cmd,
       state->rs_state.clip_halfz = true;
       state->rs_state.half_pixel_center = true;
       state->rs_state.scissor = true;
+      state->rs_state.no_ms_sample_mask_out = true;
 
       if (!dynamic_states[VK_DYNAMIC_STATE_LINE_WIDTH])
          state->rs_state.line_width = rsc->lineWidth;