Enforce need for type reflection in RuntimeHintsAgent

Prior to this commit, the AOT infrastructure would rely on the fact that
native runtime reflection on a type would only consider
methods/fields/constructors that had specific hints contributed. When
listing them through the reflection API on the type, the native image
would only return those for which we had hints contributed.
This behavior will soon change in GraalVM and will better align with the
JVM behavior: when asking for all declared methods on a type in a native
image, we should get all existing methods, not just the ones registered
previously in the native image.

This commit aligns the behavior of the `RuntimeHintsAgent` and removes
the now misleading predicates as a consequence.

Closes gh-29205

integration-tests/src/test/java/org/springframework/aot/RuntimeHintsAgentTests.java

@@ -164,22 +164,6 @@ public class RuntimeHintsAgentTests {
 						throw new RuntimeException(e);
 					}
 				}, MethodReference.of(Method.class, "invoke")),
-				Arguments.of((Runnable) () -> {
-					try {
-						toStringMethod.getAnnotations();
-					}
-					catch (Exception e) {
-						throw new RuntimeException(e);
-					}
-				}, MethodReference.of(Method.class, "getAnnotations")),
-				Arguments.of((Runnable) () -> {
-					try {
-						toStringMethod.getParameterTypes();
-					}
-					catch (Exception e) {
-						throw new RuntimeException(e);
-					}
-				}, MethodReference.of(Method.class, "getParameterTypes")),
 				Arguments.of((Runnable) () -> {
 					try {
 						privateGreetMethod.invoke(new PrivateClass());