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-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 {
 
 	/**