[JENKINS-30820] pick up the new bytecode-compat-t.

The new version of the BCT does not generate stackMap if the original code
did not contain stack maps.  Further more the new version takes a
classloader to use so that it can load classes when searching for the
common parent class.

core/src/main/java/hudson/ClassicPluginStrategy.java

@@ -797,7 +797,7 @@ public class ClassicPluginStrategy implements PluginStrategy {
         @Override
         protected Class defineClassFromData(File container, byte[] classData, String classname) throws IOException {
             if (!DISABLE_TRANSFORMER)
-                classData = pluginManager.getCompatibilityTransformer().transform(classname, classData);
+                classData = pluginManager.getCompatibilityTransformer().transform(classname, classData, this);
             return super.defineClassFromData(container, classData, classname);
         }
     }