Feature update to hibernate 6 and to jakarta ee

[aVolpe]

This is a work in progress, this is too disruptive to be applicable/useful, but I want to make this pr so if in a future
we make the jump we don't start from scratch.

This PR bumps the dependency of hibernate from 5 to 6, this is not a minor change because there
was a change in package, from javax.persistence to jakarta.persistence (more info).

Hibernate 6 also needs java at least 11.

This package change will also affect the qi and rest modules, jetty should be upgraded to 11.

Progress:

• minigl: update to hibernate 6
• minigl: migrate from hibernate criteria to jpa criteria, hibernate criteria was removed
• minigl: migrate from hql to jpql, some constructs from hql were removed.
• minigl: all tests pass
• minigl: all tests pass with postgres
• minigl: all tests pass with mysql
• minigl: there are some issues with the journal export, it doesn't work without cache lvl2.
• dbsupport: update to hibernate 6
• dbsupport: update to hibernate-ehcache 6. Currently, there are no stable modules for ehcache for hibernate 6.
• rest modules: update to jetty 11
• qi/vaadin modules: update to jetty 11
• global: re-enable testbed
• remove dom4j, this library has some problems with java 17 and we can use jdom2 which is already used in jpos.

[ar]

A change like this deserves the release of 2.2.9 and a move to 2.3.0. We can do it once you're ready with this PR.