oak-lucene uses Lucene version that can throw a StackOverflowException

See <https://github.com/apache/lucene/issues/11537>.

Analysis so far:

• oak-lucene uses lucene-core (4.7.2) (see OAK-10716); that version has reached EOL a long time ago
• the lucene version can in some cases throw a StackOverflowException, see OAK-10713
• oak-lucene embeds and exports lucene-core
• update to version >= 4.8 non-trivial due to backwards compat breakage

Work in <https://github.com/reschke/jackrabbit-oak-lucene/tree/lucene-poc>:

• inlined lucene-core as of git tag "releases/lucene-solr/4.7.2" into oak-lucene
• fixed two JDK11 compile issues (potentially uninitialized vars in finally block)
• backported fix from https://github.com/apache/lucene/issues/11537
• enable test added in OAK-10713
• ran Oak integration tests

Open questions:

• Lucene 4.7.2 builds with ant/ivy - does it make sense to try to replicate that
• should we ask Lucene team for a public release (might be hard sell)
• alternatively, as tried here, inline source code into oak-lucene (maybe add explainers to all source files)
• do we need to adopt the lucene test suite as well?
• lucene-core dependencies in other Oak modules to be checked (seems mostly for tests, or for run modules)