[FTR][Ownership] Assign Ownership to "cases migrations" ES Archives (#…

…194411)

## Summary

Modify code owner declarations for
`x-pack/test/functional/es_archives/cases/**/*` in .github/CODEOWNERS

### For reviewers

To verify this pr, you can use the `scripts/get_owners_for_file.js`
script
E.g:
```
 node scripts/get_owners_for_file.js --file x-pack/test/functional/es_archives/cases/default # Or any other file
```

#### Notes
All of these are a best guess effort. The more help from the dev teams,
the more accurate this will be for reporting in the future.

Contributes to: #192979

---------

Co-authored-by: kibanamachine <[email protected]>
Co-authored-by: Elastic Machine <[email protected]>

.github/CODEOWNERS

@@ -1122,6 +1122,7 @@ packages/kbn-monaco/src/esql @elastic/kibana-esql
 
 ### Observability Plugins
 
+
 # Observability AI Assistant
 x-pack/test/observability_ai_assistant_api_integration @elastic/obs-ai-assistant
 x-pack/test/observability_ai_assistant_functional @elastic/obs-ai-assistant
@@ -1370,6 +1371,8 @@ x-pack/test/**/deployment_agnostic/ @elastic/appex-qa #temporarily to monitor te
 /x-pack/test_serverless/**/test_suites/common/saved_objects_management/ @elastic/kibana-core
 /x-pack/test_serverless/api_integration/test_suites/common/core/ @elastic/kibana-core
 /x-pack/test_serverless/api_integration/test_suites/**/telemetry/ @elastic/kibana-core
+/x-pack/test/functional/es_archives/cases/migrations/8.8.0 @elastic/response-ops
+
 #CC# /src/core/server/csp/ @elastic/kibana-core
 #CC# /src/plugins/saved_objects/ @elastic/kibana-core
 #CC# /x-pack/plugins/cloud/ @elastic/kibana-core
@@ -1434,6 +1437,7 @@ x-pack/plugins/cloud_integrations/cloud_full_story/server/config.ts @elastic/kib
 #CC# /x-pack/plugins/security/ @elastic/kibana-security
 
 # Response Ops team
+/x-pack/test/functional/es_archives/cases/default @elastic/response-ops
 /x-pack/test_serverless/api_integration/test_suites/observability/config.ts @elastic/response-ops
 /x-pack/test_serverless/api_integration/test_suites/observability/index.ts @elastic/response-ops
 /x-pack/test_serverless/functional/page_objects/svl_triggers_actions_ui_page.ts @elastic/response-ops
@@ -1467,8 +1471,10 @@ x-pack/plugins/cloud_integrations/cloud_full_story/server/config.ts @elastic/kib
 /x-pack/test/functional/es_archives/alerts_legacy @elastic/response-ops
 /x-pack/test/functional/es_archives/observability/alerts @elastic/response-ops
 /x-pack/test/functional/es_archives/actions @elastic/response-ops
-/x-pack/test/functional/es_archives/rules_scheduled_task_id  @elastic/response-ops
-/x-pack/test/functional/es_archives/alerting/8_2_0  @elastic/response-ops
+/x-pack/test/functional/es_archives/rules_scheduled_task_id @elastic/response-ops
+/x-pack/test/functional/es_archives/alerting/8_2_0 @elastic/response-ops
+/x-pack/test/functional/es_archives/cases/signals/default @elastic/response-ops
+/x-pack/test/functional/es_archives/cases/signals/hosts_users @elastic/response-ops
 
 # Enterprise Search
 /x-pack/test_serverless/functional/page_objects/svl_ingest_pipelines.ts @elastic/search-kibana
@@ -1522,6 +1528,7 @@ x-pack/test/api_integration/apis/management/index_management/inference_endpoints
 /x-pack/test_serverless/functional/test_suites/security/index.feature_flags.ts @elastic/security-solution
 /x-pack/test_serverless/functional/test_suites/security/index.ts @elastic/security-solution
 #CC# /x-pack/plugins/security_solution/ @elastic/security-solution
+/x-pack/test/functional/es_archives/cases/signals/duplicate_ids @elastic/response-ops
 
 # Security Solution OpenAPI bundles
 /x-pack/plugins/security_solution/docs/openapi/serverless/security_solution_detections_api_* @elastic/security-detection-rule-management