HHH-17068, HHH-18585 move layer-breaking enums

[gavinking]

[Please describe here what your change is about]

---

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and can be relicensed under the terms of the LGPL v2.1 license in the future at the maintainers' discretion. For more information on licensing, please check here.

---

https://hibernate.atlassian.net/browse/HHH-17068 https://hibernate.atlassian.net/browse/HHH-18585

[hibernate-github-bot[bot]]

Thanks for your pull request!

This pull request does not follow the contribution rules. Could you have a look?

❌ All commit messages should start with a JIRA issue key matching pattern HHH-\d+     ↳ Offending commits: [3af1951f7620873614ea1f9b874977bebd30f5f9]

› This message was automatically generated.

[gavinking]

@sebersole got time to review this? Apologies for nagging.

[sebersole]

Could you run spotless on this? ;)

Otherwise, looks good to me