Add the necessary hints for use of Cglib proxies

This commit expands GeneratedClassHandler to allow invocation of
declared fields and methods. Generated proxies have a number of
internal fields and methods that are invoked via reflection.

See gh-28954

spring-context/src/main/java/org/springframework/context/aot/GeneratedClassHandler.java

@@ -39,7 +39,9 @@ import org.springframework.core.io.ByteArrayResource;
 class GeneratedClassHandler implements BiConsumer<String, byte[]> {
 
 	private static final Consumer<Builder> asCglibProxy = hint ->
-			hint.withMembers(MemberCategory.INVOKE_DECLARED_CONSTRUCTORS);
+			hint.withMembers(MemberCategory.INVOKE_DECLARED_CONSTRUCTORS,
+					MemberCategory.INVOKE_DECLARED_METHODS,
+					MemberCategory.DECLARED_FIELDS);
 
 	private final RuntimeHints runtimeHints;
 

spring-context/src/test/java/org/springframework/context/aot/GeneratedClassHandlerTests.java

@@ -54,7 +54,8 @@ class GeneratedClassHandlerTests {
 		String className = "com.example.Test$$Proxy$$1";
 		this.handler.accept(className, TEST_CONTENT);
 		assertThat(RuntimeHintsPredicates.reflection().onType(TypeReference.of(className))
-				.withMemberCategory(MemberCategory.INVOKE_DECLARED_CONSTRUCTORS))
+				.withMemberCategories(MemberCategory.INVOKE_DECLARED_CONSTRUCTORS,
+						MemberCategory.INVOKE_DECLARED_METHODS, MemberCategory.DECLARED_FIELDS))
 				.accepts(this.generationContext.getRuntimeHints());
 	}