JENKINS-74974 - Adapt to Scriptler 390+

Scriptler 390 and above use "(built-in)" to refer to the built-in node
instead of "(controller)" or "(master)". Update the test harness to
match this.

src/main/java/org/jenkinsci/test/acceptance/plugins/scriptler/ScriptResult.java

@@ -37,8 +37,8 @@ public ScriptResult(String result) {
 
     public String output(Node node) {
         String name = node.getName();
-        if (node instanceof Jenkins && "(master)".equals(name)) {
-            name = "(controller)";
+        if (node instanceof Jenkins) {
+            name = "(" + name + ")";
         }
         return output(name);
     }

src/main/java/org/jenkinsci/test/acceptance/po/Jenkins.java

@@ -216,7 +216,7 @@ public <T extends PageObject> T getPluginPage(Class<T> type) {
 
     @Override
     public String getName() {
-        return "(master)";
+        return "built-in";
     }
 
     @Override