Provide a more actionable CGLIB error message with native

Closes gh-34370

Author: sdeleuze

Diff for: spring-core/src/main/java/org/springframework/cglib/core/AbstractClassGenerator.java

@@ -360,7 +360,7 @@ protected Class generate(ClassLoaderData data) {
 			// SPRING PATCH BEGIN
 			if (inNativeImage) {
 				throw new UnsupportedOperationException("CGLIB runtime enhancement not supported on native image. " +
-						"Make sure to include a pre-generated class on the classpath instead: " + getClassName());
+						"Make sure to enable Spring AOT processing in order to pre-generate this class: " + getClassName());
 			}
 			// SPRING PATCH END
 			byte[] b = strategy.generate(this);