Merge pull request #7699 from yanggangtony/client-with-conn

Missed out `platform interface` when reused the conn for Client.

client.go

@@ -188,6 +188,12 @@ func NewWithConn(conn *grpc.ClientConn, opts ...ClientOpt) (*Client, error) {
 		runtime:   fmt.Sprintf("%s.%s", plugin.RuntimePlugin, runtime.GOOS),
 	}
 
+	if copts.defaultPlatform != nil {
+		c.platform = copts.defaultPlatform
+	} else {
+		c.platform = platforms.Default()
+	}
+
 	// check namespace labels for default runtime
 	if copts.defaultRuntime == "" && c.defaultns != "" {
 		if label, err := c.GetLabel(context.Background(), defaults.DefaultRuntimeNSLabel); err != nil {