Improve diagnostics for convention-based annotation attribute overrides

The warning message logged for an annotation that still uses
convention-based overrides now includes a concrete suggestion for how
the problem may potentially be fixed.

  WARN - Support for convention-based annotation attribute overrides is
  deprecated and will be removed in Spring Framework 6.1. Please
  annotate the 'locations' attribute in
  @org.springframework.core.annotation.MergedAnnotationsTests$ConventionBasedComposedContextConfiguration
  with an appropriate @AliasFor declaration -- for example,
  @AliasFor(annotation = org.springframework.core.annotation.MergedAnnotationsTests$ContextConfiguration.class).

See gh-28760

Author: sbrannen

spring-core/src/main/java/org/springframework/core/annotation/AnnotationTypeMapping.java

@@ -296,8 +296,8 @@ private void addConventionMappings() {
 							Support for convention-based annotation attribute overrides is \
 							deprecated and will be removed in Spring Framework 6.1. Please \
 							annotate the '%s' attribute in @%s with an appropriate @AliasFor \
-							declaration."""
-								.formatted(name, rootAnnotationTypeName));
+							declaration -- for example, @AliasFor(annotation = %s.class)."""
+								.formatted(name, rootAnnotationTypeName, this.annotationType.getName()));
 				}
 				mappings[i] = mapped;
 				MirrorSet mirrors = getMirrorSets().getAssigned(i);