[meta] saved object tagging: integration in Kibana applications

[pgayvallet]

This issue is here to track the SO tagging integration in other kibana apps.

• [ ] Canvas
• [x] Discover (https://github.com/elastic/kibana/issues/117832)
• [ ] Graph
• [x] Maps - https://github.com/elastic/kibana/issues/82434
• [x] Machine Learning
  • [x] Depends on making ML jobs SavedObjects https://github.com/elastic/kibana/pull/77916
• [ ] Alerts
  • esp import for pre-packaged alerts
  • they have an existing tag implementation
• [ ] Solutions (cases, case comments have existing tags)
• [ ] Scheduled reports (have existing tag feature)
• [ ] Observability - saved views (Metrics, etc.)
  • [ ] SLOs: https://github.com/elastic/kibana/issues/180727
• [x] Fleet Integrations (https://github.com/elastic/integrations/issues/327)

[elasticmachine]

Pinging @elastic/kibana-core (Team:Core)