Retain support for legacy JSR-250 `javax.annotation.PostConstruct`/`PreDestroy` and JSR-330 `javax.inject.Inject` in addition to Jakarta EE 9 annotations

[mp911de]

After migration to Jakarta EE 9, it's easy to miss that javax.annotation.PostConstruct or javax.inject.Inject are no longer working when not covered by a test. This can be an easy-to-make bug when these annotations reside on the classpath after migrating to Jakarta EE 9.

It would be neat to support both annotation variants for at least a grace period or to fail fast when these annotations are in use.

[mdeinum]

Would it make sense to, next to retain support, log a warning if the legacy JSR-250 annotations are detected? As to warning/incentive to the user to migrate to the Jakarta annotations?