Define compiled classes when @CompileWithTargetClassAccess is used

Update `DynamicClassLoader` to load classes eagerly if they are being
defined in the parent classloader.

See gh-28580

spring-core-test/src/main/java/org/springframework/aot/test/generator/compile/DynamicClassLoader.java

@@ -57,6 +57,9 @@ public class DynamicClassLoader extends ClassLoader {
 		this.resourceFiles = resourceFiles;
 		this.classFiles = classFiles;
 		this.defineClassMethod = findDefineClassMethod(parent);
+		if (this.defineClassMethod != null) {
+			classFiles.forEach(this::defineClass);
+		}
 	}
 
 	@Nullable