Add support for Transactional in native-image

This commit annotates @Transactional with @Reflective
and registers proxy hints for SpringProxy.

Injection of proxied beans via their interfaces still fails
in native images with a
"No qualifying bean of type MyInterface" error.

See gh-28717

spring-aop/src/main/java/org/springframework/aop/SpringProxyRuntimeHintsRegistrar.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2002-2012 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.aop;
+
+import org.springframework.aop.framework.Advised;
+import org.springframework.aot.hint.RuntimeHints;
+import org.springframework.aot.hint.RuntimeHintsRegistrar;
+import org.springframework.core.DecoratingProxy;
+
+/**
+ * {@link RuntimeHintsRegistrar} implementation that registers runtime hints for
+ * AOP proxies.
+ *
+ * @author Sebastien Deleuze
+ * @since 6.0
+ */
+public class SpringProxyRuntimeHintsRegistrar implements RuntimeHintsRegistrar {
+
+	@Override
+	public void registerHints(RuntimeHints hints, ClassLoader classLoader) {
+		hints.proxies().registerJdkProxy(SpringProxy.class, Advised.class, DecoratingProxy.class);
+	}
+}

spring-aop/src/main/resources/META-INF/spring/aot.factories

@@ -1,2 +1,4 @@
 org.springframework.beans.factory.aot.BeanRegistrationAotProcessor=\
 org.springframework.aop.scope.ScopedProxyBeanRegistrationAotProcessor
+org.springframework.aot.hint.RuntimeHintsRegistrar=\
+org.springframework.aop.SpringProxyRuntimeHintsRegistrar

spring-tx/src/main/java/org/springframework/transaction/annotation/Transactional.java

@@ -23,6 +23,7 @@ import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
 
+import org.springframework.aot.hint.annotation.Reflective;
 import org.springframework.core.annotation.AliasFor;
 import org.springframework.transaction.TransactionDefinition;
 
@@ -117,6 +118,7 @@ import org.springframework.transaction.TransactionDefinition;
 @Retention(RetentionPolicy.RUNTIME)
 @Inherited
 @Documented
+@Reflective
 public @interface Transactional {
 
 	/**