Removes the hppc ObjectArrayList from CollectionUtils.sortAndDedup

[pgomulka]

The objectArrayList can be replaced with java.util.ArrayList to achieve
in situ sorting and deduplication.

relates #84735

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[elasticmachine]

Pinging @elastic/es-core-infra (Team:Core/Infra)

[pgomulka]

btw I was looking into org.elasticsearch.common.util and wanted to clean this package, but I am not sure what to do with com.carrotsearch.hppc.BitMixer. Should we copy it?
It deserves a separate PR anyway

[rjernst]

I've actually rewritten this method in a different way: #85352

I am not sure what to do with com.carrotsearch.hppc.BitMixer. Should we copy it?

Yes, I think the 2 methods which are used should be copied. They are based on published methodologies. There is an existing BitUtil class. It could be moved to core lib and the mix methods added there.

[pgomulka]

makes sense, I am closing this in favour of #85352