Auto-configure Hibernate with a JsonFormatMapper that uses the auto-configured Jackson ObjectMapper

After migrating to Spring Boot 3.0.1 and Hibernate 6, I swapped out the Hibernate Types JSON support for the new built in @JdbcTypeCode(SqlTypes.JSON), however my Kotlin data classes failed to deserialize and I had to annotate everything with @JsonCreator and @JsonProperty to fix constructors.

I feel like this should default to the Jackson instance on the Spring context rather than the Jackson library itself, that is pulled in by Hibernate by default. It should be possible to define a custom mapper factory that can be configured via hibernate.type.json_format_mapper and point Hibernate to that instance, see https://github.com/hibernate/hibernate-orm/blob/main/documentation/src/main/asciidoc/userguide/chapters/domain/basic_types.adoc#json-mapping

Start with Spring Boot's Hibernate and Jackson auto-configuration, then read Hibernate's JSON mapping documentation and the hibernate.type.json_format_mapper configuration described in the issue. No repository file or test is named, so locate the relevant auto-configuration and existing integration tests first. Done means Hibernate JSON mapping uses the auto-configured Spring Jackson ObjectMapper, including for Kotlin data-class deserialization without extra constructor annotations.