[Lens] make visualization_ui_components plugin a static package

[drewdaemon]

Describe the feature:
As we move more of our code to a stateless context, we reap benefits of increased simplicity and verifiability, leading to higher quality and stability.

The visualization_ui_components plugin was created to make Lens UI components available outside of Lens as the need arises (e.g. #158774).

It was originally planned as a static package, but I made it a plugin because of a dependency on a Unified Search component which, being in a public context, could not be imported from a static package context.

However, most of the current plugin could be pulled out into a static package following the pattern used in #158008 where we put what we can in static packages that are then injected with Kibana dependencies via a slim plugin wrapper.

[elasticmachine]

Pinging @elastic/kibana-visualizations @elastic/kibana-visualizations-external (Team:Visualizations)