ARM Template Resource Group Deployment Redeploys

**Is your feature request related to a problem? Please describe.**
I want to be able to redeploy the last working state of my arm template in the event that:
1. My new ARM template succeeded in deploying
2. It causes runtime issues for the service that uses the deployed azure objects.

**Describe the solution you'd like**
A couple of options:
1. Add an optional parameter to the `az group deployment create` (--redeploy [previousDeploymentName]).
2. Have a separate command which does the same thing as the Azure Portal-> Resource Group -> Deployments "Redeploy" button.

**Describe alternatives you've considered**
1. Creating a deployment that will intentionally fail and then using `rollback-on-error` to reference the specific deployment I want to redeploy.
2. Calling the Azure API directly.

It looks like the functionality to redeploy an existing deployment exists, it just needs to be exposed via the azure cli.