Lucene 10 "persian" analyzer now stems by default

[cbuescher]

Lucene 10s PersianAnalyzer that we expose via the "persian" now adds a final stemming filter in apache/lucene#540. It looks like this is the default now and can only be turned off by providing an exclude-list or creating a custom analyzer without the stemming filter.

We temporarily changed the language filter documentation that show how the analyzers are internally build on the lucene_snapshot_10 branch but need to discuss and decide if we want to regard this as a breaking change or somehow restore the 9x behavior in ES.

[elasticsearchmachine]

Pinging @elastic/es-search-relevance (Team:Search Relevance)

[cbuescher]

This is closed by #113482