Allow Hibernate to use Spring Boot's validator

[philwebb]

There's not much need currently, but once #3071 is fixed we might want to consider passing our validator to Hibernate using:

vendorProperties.put("javax.persistence.validation.factory", validator);

[rhamedy]

Even though not labeled as first-timer, I would still want to offer my help to work on this issue whenever the time is right (I assume when #7748 is merged) 👍

I have previously used HibernateValidator on multiple occasions and created annotations for custom validation and this would be a good opportunity to explore Spring Boot codebase. I might need a minimal amount of direction on where to start and then I will find my way.

[snicoll]

@rhamedy thank you for the offer and we're happy to guide you once we find an issue that fits (it doesn't necessarily have to be a first timer). Let's sync again when #3071 is resolved as the outcome may change things here.

[DreamPWJ]

very much looking forward