RepositoryResourceMapping Should Work With Repositories Instead Of PersistentEntities

Hello,

up until version 3.3.9 the RepositoryResourceMappings class was using the Repositories object to populate the cache needed for the ResourceMetadataHandlerMethodArgumentResolver as you can see here:

https://github.com/spring-projects/spring-data-rest/blob/3.3.9.RELEASE/spring-data-rest-core/src/main/java/org/springframework/data/rest/core/mapping/RepositoryResourceMappings.java#L69

Then this method was changed to use the PersistentEntities as youc an see here:

https://github.com/spring-projects/spring-data-rest/blob/main/spring-data-rest-core/src/main/java/org/springframework/data/rest/core/mapping/RepositoryResourceMappings.java#L69

The PersistentEntities object is constructed by trying to locate all the javax.persistence.metamodel.Metamodel and thus completely ignores the alternativeDomainTypes a RepositoryMetadata may hold.