Upgrade to Hibernate ORM 7

[yrodiere]

Description

It's already been in the works for quite some time (see #41310) but I'm creating this issue for tracking purposes, as it's turning out to involve quite a few things.

We need to take into account:

• The release of Hibernate ORM 7.0, obviously. It is becoming increasingly unlikely to happen before Jan 15th. So we're looking at integrating it in time for the March release (3.20), maybe?
• The release of Hibernate Reactive 3/Search 8 -- they need to be upgraded at the same time.
• The release of Hibernate Validator 9 -- it might need to be upgraded at the same time, since it's Jakarta EE 11.
• The Vert.x 5 upgrade in Quarkus (cc @tsegismont). If it breaks compatibility, we might want to align Reactive 3.0 to use Vert.x 5. See Upgrade Vert.x SQL client to 5 hibernate/hibernate-reactive#2036

Implementation ideas

No response

[quarkus-bot]

/cc @DavideD (hibernate-reactive), @gavinking (hibernate-reactive), @gsmet (hibernate-orm,hibernate-search,hibernate-validator), @marko-bekhta (hibernate-search,hibernate-validator)

[marko-bekhta]

Here's a Validator upgrade #42292 (if we end up needing it for this one)

[yrodiere]

Here's a Validator upgrade #42292 (if we end up needing it for this one)

Thanks!

I'll try to get an upgrade to ORM 7.0.0.Beta3 / Reactive 3.0.0.Beta1 ready today, or at least before the holidays, so we know where we stand. I'll include Search if it's there.