Upgrade to Elasticsearch 8.14.0

[trakos]

The plugin would no longer build for newer ES versions. I've worked through the errors and test failures to fix that. Changes included in this PR allow a clean ./gradlew clean check build for Elasticsearch 8.14.0 (except for flakiness described in #483).

All changes in this PR were made only to facilitate the ES version bump. Here's the list of upstream changes that necessitated changing code:

• Remove some more ActionType subclasses elastic/elasticsearch#102354
• Inline ActionType in RequestBuilder constructors elastic/elasticsearch#102800
• Make TermStates#build concurrent apache/lucene#12183
• Remove unused arg from ActionType ctor elastic/elasticsearch#104650
• Remove ActionType#responseReader elastic/elasticsearch#104645
• Remove deprecated HandledTransportAction ctors elastic/elasticsearch#100239 which was a follow-up to Remove dangerous default executor from HandledTransportAction elastic/elasticsearch#100162
• Remove unused/deprecated TransportNodesAction ctor elastic/elasticsearch#103304 which was a follow-up to TransportNodesAction impls are local-only elastic/elasticsearch#100867
• Rename StreamInput#readGenericMap elastic/elasticsearch#104045
• Cleanup GetResponse elastic/elasticsearch#102611
• Make cluster feature predicate available to plugins elastic/elasticsearch#105022
• Remove NamedWriteableRegistry from NodeClient, pass it directly through to rest actions elastic/elasticsearch#103277
• Remove more explicit references to SearchResponse in tests elastic/elasticsearch#101092
• Add Leak Tracking to the SearchContext implementations elastic/elasticsearch#102274 which was part of [Meta] Make SearchResponse use pooled buffers for search hits elastic/elasticsearch#102030
• Remove unused ThreadPool.Names#SAME elastic/elasticsearch#107249 which was a follow-up to Reduce usage of SAME threadpool name elastic/elasticsearch#106279
• Remove some more ActionType subclasses elastic/elasticsearch#106947

[trakos]

Hi @wrigleyDan, do you know if there are any plans for bumping ES version for the LTR plugin?

[wrigleyDan]

Thanks for providing the PR @trakos.

I'll have a look next week and see if we can cut a release soon-ish. It's Berlin Buzzwords and MICES week, so please bear with me.

[wrigleyDan]

LGTM, thanks for the effort!

I'll cut a release soon.

[trakos]

Thank you for the prompt review, especially given your busy week!