consider return a distincted value of MultiValueMap for AnnotatedTypeMetadata.getAllAnnotationAttributes

Here is a simple code sample:

@Configuration(proxyBeanMethods = false)
public class FooAutoConfiguration {

    @ConditionalOnBean(FooProperties.class)
    @ConditionalOnMissingBean
    @Bean
    public FooService fooService(FooProperties fooProperties) {
        return new FooService();
    }

}

pom.xml

...
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.5.0</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
...
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
    </dependencies>

While evaluator conditional of FooService, It will be evaluated twice for OnBeanCondition because the AnnotatedTypeMetadata.getAllAnnotationAttributes returned value contains same className array org.springframework.boot.autoconfigure.condition.OnBeanCondition.

Start by tracing AnnotatedTypeMetadata.getAllAnnotationAttributes and the OnBeanCondition evaluation path described in the sample. Confirm where the repeated org.springframework.boot.autoconfigure.condition.OnBeanCondition value is produced, then add a regression test showing the intended distinct result and that the condition is evaluated only once.