[SLO] Embeddables rebuild

[mgiota]

Part of #167429

Meta issue to track progress on the rebuild of the embedables the SLO team owns

Kibana’s Embeddables system is responsible for much of the behavior we see in Kibana today. Our Embeddable infrastructure underpins: Dashboards & Portable Dashboards, the Save and Return flow, drilldowns, Triggers & Actions, Portable Lens and Maps in solutions, the New Controls, much of Canvas, and a lot more.

The system is fundamental to Kibana, but it is over-engineered, boilerplate heavy and prescriptive. The Presentation team is planning to:

• Build a new Embeddables system with the goal of making it adhere to well-known modern React paradigms.
• Rework each of the existing Embeddable implementations to use the new system
• Completely remove the old Embeddables system from Kibana.

The SLO team will be responsible for refactoring each of the embeddables that the team owns:

Tasks

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1. [Embeddables Rebuild] O11y Migrate SLO Error Budget #179294
   Feature:Embeddables Team:Presentation impact:critical loe:medium project:embeddableRebuild +5
   
2. [Embeddables Rebuild] O11y Migrate SLO Alerts #179295
   Feature:Embeddables Team:Presentation impact:critical loe:medium project:embeddableRebuild +5
   
3. [Embeddables Rebuild] O11y Migrate SLO Overview #179296
   Feature:Embeddables Team:Presentation impact:critical loe:medium project:embeddableRebuild +5
   

[elasticmachine]

Pinging @elastic/obs-ux-management-team (Team:obs-ux-management)