[Feature Request] Add support for a ForkJoinPool type #18674
Description
Is your feature request related to a problem? Please describe
In OpenSearch jVector we leverage ForkJoinPool types for faster index buildup. However, we can't register those pools within the lifecycle of the cluster through the ThreadPool object mechanism otherwise use to manage all thread pools.
Describe the solution you'd like
We would like to see a new ThreadPoolType added (e.g. ForkJoinPoolType) to the ThreadPool object support.
Related component
Other
Describe alternatives you've considered
NA