[Lens] Improve Lens embeddable error handling

[flash1293]

Right now, an exception thrown during expression generation results in an uncaught exception and a blank panel without further information.

Instead, this error should be caught and rendered as a regular error like a configuration not validating properly, with appropriate data-render-error and data-render-complete attributes.

See #103561

[elasticmachine]

Pinging @elastic/kibana-app (Team:KibanaApp)

[drewdaemon]

I think we could

1. wrap the expression building in a try catch and return the error from the persistedStateToExpressionFunction
2. display an error via this.addUserMessage on the embeddable side

[stratoula]

Closing in favor of #144224