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/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