[resource-graph] Queries always return resourceGroup even when just requesting id

### Extension name (the extension in question)
azure-cli 2.21.0
resource-graph 1.1.0

### Description of issue (in as much detail as possible)
When doing a simple query like:
`az graph query -q "Resources | project id"`

it will always return id + resourceGroup

```
[
{
"id": "/subscriptions/....",
"resourceGroup": "Name_of_ReG"
}
]
```

I would expect it to return the columns I requested.

I can work around it by doing an additional query with az-cli
`az graph query -q 'Resources | project id' --query '[].{id:id}'`

Greetings
Klaas