[ck_tile] enable test grouped_gemm_quant and gemm_streamk on gfx12 (#3196)

1. Enable grouped_gemm_quant and gemm_streamk on gfx12
- test_ck_tile_streamk_smoke is kept on gfx9, since it looks someone is still working on it.
2. Update warp tile size in grouped_gemm_quant and gemm_streamk unit test
3. Reduce gemm tile size to pass the build on gfx12 in test_gemm_streamk_reboot_types.hpp

include/ck_tile/ops/gemm/kernel/streamk_gemm_kernel.hpp

@@ -662,7 +662,7 @@ struct StreamKKernel
         hip_check_error(
             hipOccupancyMaxActiveBlocksPerMultiprocessor(&occupancy, kernel, kBlockSize, 0));
 
-        return occupancy;
+        return max(occupancy, 1);
     }
 };
 } // namespace reboot