Use event recorder to provide more detailed error messages

[mcavoyk]

Is your feature request related to a problem? Please describe. Currently condition message provides a very detailed error fields but no events are recorded for the ExternalSecret resource.

Describe the solution you'd like Kubernetes events should be used to provide more detailed error messages and history of attempts and most recent errors. This would be in line with how both built-in controllers and other Kubernetes addons operate.

/kind feature