[8.14] [ESS][8.14] Alert suppression docs for EQL (non-seq) and new term rule types (backport #5057)

[mergify]

Contributes to #4977 and #5030

Previews:

• Suppress detection alerts: Made several changes to the alert suppression docs:
  • Added event correlation and new terms to the list of rule types that support alert suppression
  • Multiple updates in the "Configure alert suppression" section
  • Updated the "Alert suppression limit by rule type" section to convey the max alert limits for the event correlation and new terms rule types
• Create an event correlation rule - Added an optional step for suppression alerts (see step 3)
• Create a new terms rule - Same as above
• Create rule API | Optional alert suppression fields for query, threshold, and indicator match rules - Updated title to show that the suppression fields apply to event correlation and new terms rules
• Update rule API | Optional alert suppression fields for query, threshold, and indicator match rules - Same as above

Twin serverless PR: https://github.com/elastic/staging-serverless-security-docs/pull/321

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This is an automatic backport of pull request #5057 done by Mergify.

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