[8.14] (Doc+) SIEM + frozen tier compatibility (backport #5564)

[mergify]

👋🏽 howdy, team!

1. Since ES Data Tiers are sequentially hardware performant, because we call out cold this appends the same rules apply to frozen (related to securitySolution:excludeColdAndFrozenTiersInAnalyzer from kibana#172162). Kindly see examples
   • kibana#139969 for linked internal examples of e.g. alert indices .alerts-security* being hosted in frozen breaking SIEM.
   • kb#39606517 where frozen indices containing future dates catch in the Rule lookback window and therefore can degrade product performance.
2. It looks like there's a duplicate section in the SIEM and Kibana docs from security-docs#487 and kibana#103151, respectively, where the latter had additional phrasing so cross-pollinated.
   • ( Paper-trail FYI for my team: security-docs#551 later appears to confirm indicator rules don't support cold, to confirm between PR's which is latest state in (2). It does also suggest indicator match rules do not support cross cluster search, but that was purposely later removed in security-docs#3054 for v8.7 . )

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  This is an automatic backport of pull request (Doc+) SIEM + frozen tier compatibility  #5564 done by Mergify.

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