disable quant_dot test for CPU backend, it requires removing downcast converts...

disable quant_dot test for CPU backend, it requires removing downcast converts in "ref"implementation. Inside the "ref" impelmentation, it downcasting one of the inputs of the GEMM from float to fp8. Which is a lossy conversion and while computing gemm, it upcasts it back to  float.  CPU backend removes converts completely since it is going from "float->fp8->float". due to lossy cast, results are coming out different.

test/verify/main.cpp

@@ -76,7 +76,11 @@ int main(int argc, const char* argv[])
                          "test_select_module_conv",
                          "test_split_single_dyn_dim",
                          "test_instancenorm_large_3d<migraphx::shape::float_type>",
-                         "test_instancenorm_large_3d<migraphx::shape::half_type>"});
+                         "test_instancenorm_large_3d<migraphx::shape::half_type>",
+                         "batch_quant_dot_1<migraphx::fp8::fp8e4m3fnuz, float>",
+                         "quant_dot_3args_4<migraphx::fp8::fp8e4m3fnuz, float>",
+                         "quant_dot_3args_5<migraphx::fp8::fp8e4m3fnuz, float>"});
+
     rv.disable_test_for("gpu", {"test_conv_bn_add"});
     rv.run(argc, argv);
 }