[Security Solution] Prebuilt rule deprecation test plan

[dplumlee]

Summary

Epic: internal link
Implementation PR: #259673

Adds test plan for the prebuilt rule deprecation feature in /prebuilt_rule_deprecation.md using the existing template.

New scenarios:

• [Default exclusion from existing flows]
  • [Scenario: Deprecated rules are excluded from install review]
  • [Scenario: Deprecated rules are excluded from upgrade review]
  • [Scenario: Deprecated rules are excluded from bootstrap]
  • [Scenario: Deprecated rules are excluded from fetchAssetsByVersion]
  • [Scenario: Deprecated rules are excluded from fetchLatestAssets]
• [Status API: deprecated count]
  • [Scenario: Status API returns correct count of installed deprecated rules]
  • [Scenario: Status API returns zero when no installed rules are deprecated]
• [Deprecation review API: no filter]
  • [Scenario: Review API returns all installed deprecated rules when no ids provided]
  • [Scenario: Review API returns installed rule name, not package name]
• [Deprecation review API: with ids filter]
  • [Scenario: Review API filters by installed rule SO ids]
  • [Scenario: Review API returns empty when filtered rule is not deprecated]
  • [Scenario: Review API returns empty when filtered id does not exist]
• [Deprecation review API: edge cases]
  • [Scenario: Review API respects MAX_DEPRECATED_RULES_TO_RETURN limit]
  • [Scenario: Review API handles package with no deprecated rules]
• [Rule Management page: deprecation callout]
  • [Scenario: Callout appears when user has installed deprecated rules]
  • [Scenario: Callout does not appear when no deprecated rules are installed]
• [Rule Management page: deprecated rules modal]
  • [Scenario: Modal lists all deprecated installed rules with links]
  • [Scenario: User can delete all deprecated rules from the modal]
  • [Scenario: Delete all button is disabled for read-only users]
• [Rule Details page: deprecation callout]
  • [Scenario: Callout appears on deprecated prebuilt rule details page]
  • [Scenario: Callout does not appear on non-deprecated rule details page]
  • [Scenario: Callout does not appear on custom rule details page]
  • [Scenario: Action buttons are disabled for read-only users]
• [Rule Details page: delete deprecated rule]
  • [Scenario: User can delete a deprecated rule from its details page]
• [Rule Details page: duplicate and delete deprecated rule]
  • [Scenario: User can duplicate and delete a deprecated rule]
  • [Scenario: Original rule is not deleted if duplication fails]

[elasticmachine]

Pinging @elastic/security-detections-response (Team:Detections and Resp)

[elasticmachine]

Pinging @elastic/security-solution (Team: SecuritySolution)

[elasticmachine]

Pinging @elastic/security-detection-rule-management (Team:Detection Rule Management)