fix merge issue and duplicate test

src/targets/gpu/lowering.cpp

@@ -92,6 +92,7 @@ struct miopen_apply
         add_extend_op<miopen_contiguous, op::contiguous>("contiguous");
         add_extend_op<hip_concat, op::concat>("concat");
         add_extend_op<miopen_softmax, op::softmax>("softmax");
+        add_extend_op<hip_gather, op::gather>("gather");
         add_extend_op<hip_pad, op::pad>("pad");
 
         add_convolution_op();

test/gpu/miopen.cpp

@@ -1070,7 +1070,6 @@ struct test_conv_bn_relu_pooling2
 
 int main()
 {
-    verify_program<test_pad>();
     verify_program<test_abs>();
     verify_program<test_concat>();
     verify_program<test_concat2>();