Special case entity expression mapping with limit 1 to support MySQL and MariaDB

[beikov]

Special case mappings with an entity expression and a limit of 1 to also use the equals predicate instead of the IN predicate. Follow up of #1810

@Mapping(value = "PageRevision[page.id = VIEW(page.id)]", fetch = FetchStrategy.JOIN)
@Limit(limit = "1", order = "id DESC")
PageRevisionGraphQlView getLastRevision();

This still produces an error on MySQL/MariaDB because the correlated subquery uses a limit which is not supported.