`create` should override existing service

### Why it needs to get done

This change is affecting edge case:

When user is trying to create a notebook wile the service with the same name exists the dss will not allow that. Steps to reproduce.

```
pip install .
export DSS_KUBECONFIG=~/.kube/config # assuming config is set
dss initialize
kubectl create service clusterip empty-service --tcp=80:9376 -n dss
dss create empty-service --image=pytorch
```

output:
```
2024-04-19 11:55:53 [INFO] [main] [create_notebook_command]: Executing create command
2024-04-19 11:55:53 [ERROR] [create_notebook] [create_notebook]: Failed to create Notebook. Notebook with name 'empty-service' already exists.
Please specify a different name.
2024-04-19 11:55:53 [ERROR] [utils] [get_service_url]: Failed to get the URL of notebook name with error code 404.
Check the debug logs for more details.
2024-04-19 11:55:53 [DEBUG] [utils] [get_service_url]: Failed to get the URL of notebook name with error: services "name" not found
```

Instead of the existing behavior the dss create should override existing service.

### What needs to get done

`dss create` can create notebooks in dss namespace even if services with the same name already exist. These services will be overridden.

### When is the task considered done

Functionality is implemented and tested.