Remove analyzer version deprecation check

[benwtrent]

Version has been deprecated since v7: #74073

Removing checking for the version setting. It has been ignored and does nothing for the entirety of 8 and for the last minors of v7.

[elasticsearchmachine]

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

[john-wagster]

This is a little hard to validate in review, a lot of things touched. But what I'm seeing here LGTM.

[benwtrent]

@elasticmachine update branch

[benwtrent]

@elasticmachine update branch

[cbuescher]

Re-visiting this PR for brief pulse check if we still want the deprecation warning for analysis components that use the "version" parameter. With the read-only N-2 index support we might encounter indices that use this setting in their analysis configuration. As far as I see we didn't do anything with it at least in most of the 7x releases, with the current state we would simply ignore the settings and be done with it.
If we want the deprecation warning back we can probably add it without having to carry all the settings objects around and move deprecation to somewhere more central (i.e. AnalysisRegistry#buildMapping or somewhere in that area).
@benwtrent if you're okay with the removal as is let me know, I was just checking this as part of re-visiting our decisions for v9 removal in light of the new N-2 support policy.

[benwtrent]

@cbuescher I am fine keeping it removed these settings were deprecated in 7x, which is -2 v9.