GH-406 - Improving the detection of Spring AOT classes.

We now inspect the classes for the newly introduced Spring AOT @Generated annotation instead of a name containing a double underscore.

spring-modulith-integration-test/src/main/java/com/acme/myproject/aot/Spring__Aot.java

@@ -15,10 +15,12 @@
  */
 package com.acme.myproject.aot;
 
+import org.springframework.aot.generate.Generated;
+
 /**
- *
  * @author Oliver Drotbohm
  */
+@Generated
 public class Spring__Aot {
 
 }