tu: Disable sample counting for 3d blits during occlusion query

tu: Disable sample counting for 3d blits during occlusion query

Per Vulkan spec only "Draw" commands should be counted towards
occlusion query.

Apparently RB_SAMPLE_COUNT_CONTROL::UNK0 bool controls whether
sample counting is enabled, so we could use it to disable
sample counting for 3d blits which are sometimes used for
clear/copy/blit/gmem-store/resolve operations.

Fixes GL CTS tests running through Zink:
 dEQP-GLES3.functional.occlusion_query.depth_clear
 dEQP-GLES3.functional.occlusion_query.depth_clear_stencil_clear
 dEQP-GLES3.functional.occlusion_query.scissor_depth_clear_stencil_clear
 dEQP-GLES3.functional.occlusion_query.scissor_stencil_clear
 dEQP-GLES3.functional.occlusion_query.stencil_clear

Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/6559

Signed-off-by: Danylo Piliaiev <dpiliaiev@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17138>