Triggered actionable error is not showing the proper message

### Expected behavior
When an actionable error is triggered, that is not wrap inside an `error` type, the action text associated with it should be shown as part of the error.

### Actual behavior
Instead, only the error message appears in the error.

### Information
- Skaffold version: v2.0.0-beta1-33-gf30cf99c0
- Operating system: MacOS
- Installed via: local build

### Steps to reproduce the behavior
1. From the source code, trigger an Actionable error, without wrapping it inside an `error` type
2. In the console, once the Actionable error appears, only the error message is shown, the action text associated with it does not appear

It looks like in https://github.com/GoogleContainerTools/skaffold/blob/main/pkg/skaffold/errors/errors.go#L90, in the `ShowAIError` function, we are unwrapping the error once, so, if we return an Actionable error directly, we are not able to recognize it with the proper type.