[Security Solution] Expand rule upgrade review functionality test plan and coverage to include all rule fields

[jpdjere]

Partially resolves: #202078

Summary

• This PR expands the rule upgrade review functionality (performed by the /upgrade/_review endpoint) test plan and coverage to include all diffable fields:
  • Extends: upgrade.md test plan to list all diffable fields that should be tested
  • Refactors and extends existing upgrade_review_prebuilt_rules.[ALGORITHM]_fields.ts integration test suites to actually test reviewing upgrades for all possible diffable fields.
  • Adds new upgrade_review_prebuilt_rules.simple_fields.ts for testing fields which still have the simple diff algorithm, which was missing.

Flaky test run

🕐 https://buildkite.com/elastic/kibana-flaky-test-suite-runner/builds/7636

Checklist

Check the PR satisfies following conditions.

Reviewers should verify this PR satisfies this list as well.

• Flaky Test Runner was used on any tests changed
• The PR description includes the appropriate Release Notes section, and the correct release_note:* label is applied per the guidelines

[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)

[kibanamachine]

Flaky Test Runner Stats

🟠 Some tests failed. - kibana-flaky-test-suite-runner#7636

[❌] x-pack/test/security_solution_api_integration/test_suites/detections_response/rules_management/prebuilt_rules/management/trial_license_complete_tier/configs/ess.config.ts: 74/100 tests passed.
[✅] x-pack/test/security_solution_api_integration/test_suites/detections_response/rules_management/prebuilt_rules/management/trial_license_complete_tier/configs/serverless.config.ts: 100/100 tests passed.

see run history

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: a06f407

Metrics [docs]

✅ unchanged

History

• 💚 Build #263205 succeeded 9b4915a
• 💔 Build #263200 failed 01257a1

cc @jpdjere

[elasticmachine]

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