[Quota Service] Property name in swagger is case mismatch with the api implementation

**Issue Description:**
The properties of `UsagesObject` are defined as camel case in [swagger](https://github.com/Azure/azure-rest-api-specs/blob/afa158ef56a05f6603924f4a493817cec332b113/specification/quota/resource-manager/Microsoft.Quota/stable/2023-02-01/quota.json#L863) like this:
```JSON
"UsagesObject": {
"description": "The resource usages value.",
"type": "object",
"properties": {
"value": {
"type": "integer",
"format": "int32",
"description": "The usages value."
},
"usagesType": {
"$ref": "#/definitions/UsagesTypes"
}
},
```
However, the response of the API from service is like below:
```JSON
{
"properties": {
"usages": {
"UsagesType": "Independent",
"Value": -1
},
"name": {
"value": "standardNDSFamily",
"localizedValue": "Standard NDS Family vCPUs"
},
"properties": {},
"unit": "Count",
"isQuotaApplicable": true
},...
}
```

**Impact:**
This issue blocks the customer to fetch these values through SDK.

Start with the UsagesObject definition in specification/quota/resource-manager/Microsoft.Quota/stable/2023-02-01/quota.json at the linked line, then compare its property names with the service response shown in the issue. Update the specification to match the API's casing and verify that the schema represents the returned values correctly.

Written by the indexing model from the issue text.