[BUG] Upgrade custom implementation to use Lucene99Codec

[mgodwan]

OS 2.x branch recently upgraded to use Lucene 9.9.1

We need to evaluate if we require changes in custom-codecs as well to rely on the new codecs introduced.

e.g.
https://github.com/opensearch-project/custom-codecs/blob/main/src/main/java/org/opensearch/index/codec/customcodecs/Lucene95CustomCodec.java#L93C36-L93C49

[mgodwan]

If we don't have upgrade tests, I think we also should add the same as part of this exercise.
@sarthakaggarwal97 Can you please check?

[sarthakaggarwal97]

Thanks @mgodwan for creating the issue. Will take a look.

[andrross]

#99 has been merged to 2.x. Next we need to forward-port that change to main.

[sarthakaggarwal97]

Closing this as the change is merged! thanks