SpringBoot Remove @Persistent from CouchbaseDataConfiguration's entity scanning to re-align with Spring Data Couchbase

Scanning for @Persistent was removed in https://github.com/spring-projects/spring-data-couchbase/commit/351370ba4d0f166a6c59c5a92bcd179bea97c688. We should update CouchbaseDataConfiguration to match.

Comment From: scottfrederick

Duplicates #26074