Major Description
During OAK-7411 a lot of work was required to move dependencies from oak-lucene to oak-search.
While this was good in general, since oak-lucene exports the package (org.apache.jackrabbit.oak.plugins.index.lucene), IndexFormatVersion could be used outside of oak-lucene to programmatically create index definitions and therefore should keep existing in oak-lucene.
Other classes in that same package may need similar work.