Refine `DefaultNeo4jPersistentProperty.isEntity()` and `getPersistentEntityTypeInformation()` checks

Based on https://github.com/spring-projects/spring-data-commons/issues/3056, type checks to include a property's type as entity require refinement to check against a registered converter since the entity detection mechanism in `BasicPersistentProperty.getPersistentEntityTypeInformation()` no longer uses `isEntity()` due to internal recursive calls.