Deploying to a Container Apps: Allow Updating Existing Deployments and Existing Container Registry

[thern743]

The extension currently detects a Dockerfile and allows the user to choose an image-based deployment. However, the extension currently creates a new container registry for each deployment. There doesn't appear to be a way to "update" an existing deployment by publishing an new image/container instance. The evidence here is that the user is never prompted to even select a container registry instance, image name, or tag.

[nturinski]

Thanks for filing this issue. The feature exists in the actual Container Apps extension, so we need to improve the Container App API call to leverage the settings that are created on deploy to container app.