Refine default MKL-DNN Pass order (#16490)

* Refine default MKL-DNN Pass order

test=develop

* Add comment to default MKL-DNN Pass list

test=develop

Author: Sand3r-

paddle/fluid/inference/api/paddle_pass_builder.h

@@ -121,6 +121,8 @@ class CpuPassStrategy : public PassStrategy {
 
       for (auto &pass : std::vector<std::string>(
                {"depthwise_conv_mkldnn_pass",    //
+                "conv_bn_fuse_pass",             // Execute BN passes again to
+                "conv_eltwiseadd_bn_fuse_pass",  // preserve correct pass order
                 "conv_bias_mkldnn_fuse_pass",    //
                 "conv3d_bias_mkldnn_fuse_pass",  //
                 "conv_relu_mkldnn_fuse_pass",    //