set use_cudnn=true for conv2d (#45587)

paddle/phi/api/yaml/api_compat.yaml

@@ -30,7 +30,7 @@
 - api : conv2d
   backward : conv2d_grad
   extra :
-    attrs : [bool use_cudnn = false, bool fuse_relu_before_depthwise_conv = false, bool use_mkldnn = false,
+    attrs : [bool use_cudnn = true, bool fuse_relu_before_depthwise_conv = false, bool use_mkldnn = false,
              bool use_quantizer = false, str mkldnn_data_type = "float32", bool fuse_relu = false,
              str fuse_activation = "", float fuse_alpha = 0.0f, float fuse_beta = 0.0f, bool use_addto = false,
              bool fuse_residual_connection = false, float Scale_in = 1.0f, float Scale_out = 1.0f,