Add reflection hints for bean registration interfaces

Prior to this commit, the bean registration AOT contributions would
register introspection and invocation hints on both declared and public
methods for bean types. The bean introspection algorithm also looks at
default methods implemented by interfaces when collecting bean property
information.

This commit ensures that introspection hints are registered for all
implemented interfaces when registering beans.

Closes gh-31350

Author: bclozel

spring-beans/src/main/java/org/springframework/beans/factory/aot/BeanRegistrationsAotContribution.java

@@ -118,6 +118,9 @@ private void generateRegisterHints(RuntimeHints runtimeHints, Map<BeanRegistrati
 			ReflectionHints hints = runtimeHints.reflection();
 			Class<?> beanClass = beanRegistrationKey.beanClass();
 			hints.registerType(beanClass, MemberCategory.INTROSPECT_PUBLIC_METHODS, MemberCategory.INTROSPECT_DECLARED_METHODS);
+			for (Class<?> interfaceType : beanClass.getInterfaces()) {
+				hints.registerType(interfaceType, MemberCategory.INTROSPECT_PUBLIC_METHODS);
+			}
 			// Workaround for https://github.com/oracle/graal/issues/6510
 			if (beanClass.isRecord()) {
 				hints.registerType(beanClass, MemberCategory.INVOKE_PUBLIC_METHODS, MemberCategory.INVOKE_DECLARED_METHODS);

spring-beans/src/test/java/org/springframework/beans/factory/aot/BeanRegistrationsAotContributionTests.java

@@ -149,6 +149,11 @@ void applyToRegisterReflectionHints() {
 		assertThat(reflection().onType(TestBean.class)
 				.withMemberCategories(MemberCategory.INTROSPECT_PUBLIC_METHODS, MemberCategory.INTROSPECT_DECLARED_METHODS))
 				.accepts(this.generationContext.getRuntimeHints());
+		for (Class<?> interfaceType : TestBean.class.getInterfaces()) {
+			assertThat(reflection().onType(interfaceType)
+					.withMemberCategory(MemberCategory.INTROSPECT_PUBLIC_METHODS))
+					.accepts(this.generationContext.getRuntimeHints());
+		}
 	}
 
 	@Test