Add packedB layout to default bfloat16 test

Author: ggojska

sycl/test-e2e/Matrix/joint_matrix_bfloat16.cpp

@@ -30,18 +30,24 @@ int main() {
     if (combinations[i].nsize == 0) { // Intel AMX
       test<bfloat16, float, float, /*TM*/ 16, /*TN*/ 16, /*TK*/ 16,
            layout::row_major, 1>();
+      test<bfloat16, float, float, /*TM*/ 16, /*TN*/ 16, /*TK*/ 16,
+           layout::ext_intel_packed, 2>();
       break;
     }
 
     if (combinations[i].nsize == 16) { // architecture::intel_gpu_pvc
       test<bfloat16, float, float, /*TM*/ 8, /*TN*/ 16, /*TK*/ 16,
            layout::row_major, 1>();
+      test<bfloat16, float, float, /*TM*/ 8, /*TN*/ 16, /*TK*/ 16,
+           layout::ext_intel_packed, 2>();
       break;
     }
 
     if (combinations[i].nsize == 8) { // architecture::intel_gpu_dg2*
       test<bfloat16, float, float, /*TM*/ 8, /*TN*/ 8, /*TK*/ 16,
            layout::row_major, 1>();
+      test<bfloat16, float, float, /*TM*/ 8, /*TN*/ 8, /*TK*/ 16,
+           layout::ext_intel_packed, 2>();
       break;
     }
   }