HHH-19466 fix exposure of SPI types via JpaMetamodel

[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-19466

[gavinking]

@marko-bekhta Does this impact Search?

[marko-bekhta]

@marko-bekhta Does this impact Search?

Looks ok:

.... 
[INFO] Hibernate Search Reports ........................... SUCCESS [  1.540 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  03:39 min
[INFO] Finished at: 2025-05-16T00:06:31+02:00
[INFO] ------------------------------------------------------------------------

^ built against this PR

[gavinking]

Excellent, thanks man!