Initialize dynamic actions in embeddable

[streamich]

Serialized dynamic actions (aka events) are stored in events field on input of each dashboard panel. When dashboard loads we need to deserialize and instantiate those actions in the global ui_actions registry. When dashboard is destroyed, we need to remove those actions from the registry.

• Register events into registry when dashboard embeddable container is created. Drilldown events 4 #59876
• Remove them from registry when dashboard embeddable container is destroyed. Drilldown events 5 #59885
• Synchronize events with global registry when new events are added or removed.

Parent issue: #43299

[elasticmachine]

Pinging @elastic/kibana-app-arch (Team:AppArch)