Initial support for JPA 3.2

[jhoeller]

There are several new API methods in the upcoming JPA 3.2 (Jakarta EE 11) that might be interesting to support in Spring's JPA container arrangement, e.g. Query.getSingleResultOrNull and EntityManagerFactory.run/callInTransaction:

https://deploy-preview-652--jakartaee-specifications.netlify.app/specifications/persistence/3.2/

[Petros1020]

Hi I would like to work on this issue.

[Petros1020]

@jhoeller any update on this?

[jhoeller]

@Petros1020 first of all, thanks for volunteering! This is in the works already so we are not quite expecting external contributions here, at least not for the above-mentioned Query and EntityManagerFactory additions. That said, if there are any other JPA 3.2 related enhancements that we can support, feel free to investigate them and provide corresponding pull requests.