Try early initialization for all user-declared methods (including interfaces)

Closes gh-32682

spring-core/src/main/java/org/springframework/cglib/proxy/MethodProxy.java

@@ -57,7 +57,7 @@ public class MethodProxy {
 		proxy.createInfo = new CreateInfo(c1, c2);
 
 		// SPRING PATCH BEGIN
-		if (!c1.isInterface() && c1 != Object.class && !Factory.class.isAssignableFrom(c2)) {
+		if (c1 != Object.class && c1.isAssignableFrom(c2.getSuperclass()) && !Factory.class.isAssignableFrom(c2)) {
 			// Try early initialization for overridden methods on specifically purposed subclasses
 			try {
 				proxy.init();