Remove workaround for HHH-19386

[DavideD]

Hibernate ORM 7.0.0.CR1 had this bug: https://hibernate.atlassian.net/browse/HHH-19386

We have a couple of workarounds to remove after the next upgrade:

• hibernate-reactive/hibernate-reactive-core/src/main/java/org/hibernate/reactive/session/impl/ReactiveSessionImpl.java

  Line 408 in 29d84cd

  // Workaround for ORM, can be remove when this issue is solved: https://hibernate.atlassian.net/browse/HHH-19386

• hibernate-reactive/hibernate-reactive-core/src/main/java/org/hibernate/reactive/session/impl/ReactiveStatelessSessionImpl.java

  Line 910 in 29d84cd

  // Workaround for ORM, can be remove when this issue is solved: https://hibernate.atlassian.net/browse/HHH-19386