Sinks: implement a way to expose the cause of the sink being in with "error" status through the platform

[manrodrigues]

For now, there is no help for the user to help him enter why the sink is giving an error: problem with credentials, limit on the flow of requests, system failure.

In this case, all I know is that my sink is in error.

We need to implement a way to expose the cause of the error through the platform and, thus, allow the user to hit his sink and use the platform as expected

[manrodrigues]

Now we have the backend response, so we need to have a way to expose it on UI.

[manrodrigues]

ok