agent: fix the issue of convert OCI spec to RPC spec

Since the rpc spec used an interface to represen the ErrnoRet,
thus the transform function of OCItoGRPC should take care of
this case.

Depends-on: github.com/kata-containers/tests#3629

Fixes: #1441

Signed-off-by: fupan.lfp <fupan.lfp@antgroup.com>

src/runtime/virtcontainers/pkg/agent/protocols/grpc/config.json

@@ -524,7 +524,8 @@
 						"write",
 						"writev"
 					],
-					"action": "SCMP_ACT_ALLOW"
+					"action": "SCMP_ACT_ALLOW",
+					"errnoRet": 1008
 				},
 				{
 					"names": [

src/runtime/virtcontainers/pkg/agent/protocols/grpc/utils.go

@@ -53,6 +53,15 @@ func copyValue(to, from reflect.Value) error {
 		return copySliceValue(to, from)
 	case reflect.Map:
 		return copyMapValue(to, from)
+	case reflect.Interface:
+		if to.Type().Name() == "isLinuxSyscall_ErrnoRet" {
+			dest := LinuxSyscall_Errnoret{Errnoret: uint32(from.Uint())}
+			var destintf isLinuxSyscall_ErrnoRet = &dest
+			toVal := reflect.ValueOf(destintf)
+			to.Set(toVal)
+			return nil
+		}
+		return grpcStatus.Errorf(codes.InvalidArgument, "Can not convert %v to %v, kind= %v", from.Type(), to.Type(), toKind)
 	default:
 		// We now are copying non pointers scalar.
 		// This is the leaf of the recursion.
@@ -62,7 +71,7 @@ func copyValue(to, from reflect.Value) error {
 				return nil
 			}
 
-			return grpcStatus.Errorf(codes.InvalidArgument, "Can not convert %v to %v", from.Type(), to.Type())
+			return grpcStatus.Errorf(codes.InvalidArgument, "Can not convert %v to %v, kind= %v", from.Type(), to.Type(), toKind)
 		}
 
 		to.Set(from)