Support `@AnnotatedWith` on decorators

Expected behavior

When trying to use @AnnotatedWith to annotate a mapper implementation class with Spring's @ConditionalOnProperty on a @DecoratedWith mapper

@Mapper(componentModel = "spring")
@AnnotatedWith(value = ConditionalOnProperty.class, elements = {
    @Element(name = "name", strings = "Property"),
    @Element(name = "havingValue", strings = "")
})
@DecoratedWith(Decorator.class)
interface MyMapper { }

Mapstruct correctly annotates the Impl_ class

@Generated(/* ... */)
@Component
@ConditionalOnProperty(
    name = "Property",
    havingValue = ""
)
@Qualifier("delegate")
public class MapperImpl_ { }

I was also expecting that the Decorator's base component class would be annotated

@Generated(/* ... */)
@Component
@ConditionalOnProperty(
    name = "Property",
    havingValue = ""
)
@Primary
public class MapperImpl extends Decorator { }

Actual behavior

Base implementation component is not annotated

@Generated(/* ... */)
@Component
@Primary
public class MapperImpl extends Decorator { }

This leads to a runtime error where, if I try to inject a mapper instance, it will fail providing a bean for MapperImpl since the delegate is conditional.

2024-08-09T11:26:29.123+01:00  WARN 44711 --- [mcve] [           main] s.c.a.AnnotationConfigApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'mapstructAwApplicat
ion': Unsatisfied dependency expressed through field 'mapper': No qualifying bean of type 'com.example.mapstructaw.MyMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
2024-08-09T11:26:29.126+01:00  INFO 44711 --- [mcve] [           main] .s.b.a.l.ConditionEvaluationReportLogger :

Error starting ApplicationContext. To display the condition evaluation report re-run your application with 'debug' enabled.
2024-08-09T11:26:29.130+01:00 ERROR 44711 --- [mcve] [           main] o.s.b.d.LoggingFailureAnalysisReporter   :

***************************
APPLICATION FAILED TO START
***************************

Description:

Field mapper in com.example.mapstructaw.MapstructAwApplication required a bean of type 'com.example.mcve.MyMapper' that could not be found.

The injection point has the following annotations:
        - @org.springframework.beans.factory.annotation.Autowired(required=true)


Action:

Consider defining a bean of type 'com.example.mapstructaw.MyMapper' in your configuration.

Steps to reproduce the problem

This should be enough to reproduce the issue in a plain spring boot starter project

@Mapper(componentModel = "spring")
@AnnotatedWith(value = ConditionalOnProperty.class, elements = {
        @Element(name = "name", value = "Property"),
        @Element(name = "havingValue", value = ""),
})
@DecoratedWith(Decorator.class)
interface MyMapper { }

abstract class Decorator implements MyMapper { }

@SpringBootApplication
public class McveApplication {
    @Autowired MyMapper mapper;

    public static void main(String[] args) {
        SpringApplication.run(McveApplication.class, args);
    }
}

MapStruct Version

1.6.0.RC1