Support HTTP_Client in Azure Open AI requests

- **azure-ai-evaluation**:
- **latest**:
- **windows**:
- **3.12**:

**Describe the bug**
Azure OpenAI Connection don't support http_client in the AzureModelConfig neither in the requests.

**To Reproduce**
Steps to reproduce the behavior:
1. Add the parameter of http_client as posible key for the AzureModelConfig
2. Add it to the validations of the dictionary
3. In the request to azure open ai, include http_client when invoking AzureOpenAI.
4. Same for AzureOpenAIGrader.

**Expected behavior**
I expect I can send http_client to the requests to azure open ai.

**Additional context**
In order to reach out to Azure resources from local network I need to create http_client and specify the path where my SSL certificate is located. Otherwise I get an API error.