Spring fix: the basePackage do not have META-INF/spring.component then switc…

If the basePackage not defined in META-INF/spring.component, then using old scanCandidateComponents(basePackage);

Otherwise the basePackage not in META-INF/spring.component will not load if the env classpath has any META-INF/spring.component file.

the issue poc code: https://github.com/qxo/spring-components-index-bug-poc

Comment From: snicoll

@qxo thanks for the PR but the component indexer has been deprecated so we won't make further change to it, see #30431