Azure DevOps CLI Create Service Connection with Installation Token

### Extension name: Azure DevOps

### Description
How do I create a GitHub service connection using an InstallationToken (the installed GitHub app) instead of an OAuth flow/PAT?

I can see the following service connection in one of my existing orgs, by running:
```az devops service-endpoint list```
```
[
{
"authorization": {
"scheme": "InstallationToken"
},
"createdBy": {
...
},
"data": {
"AvatarUrl": "https://avatars3.githubusercontent.com/u/63518284?v=4",
"pipelinesSourceProvider": "github"
},
...
"type": "GitHub",
"url": "https://github.com"
}
]
```

But how do I create such a connection using the DevOps CLI? It only seems to support OAuth or entering a PAT when creating a GitHub connection.