[🚀 Feature]: [dotnet] Local driver HTTP communication inherits OS system proxy

### Description

If the machine running Selenium is configured with a system proxy, and for some reason the proxy isn't bypassed for localhost, then the DriverService is unable to connect to the ChromeDriver because it uses the default HttpClient.

I want to be able to set the proxy (or the HttpClientHandler) in the DriverService's HttpClient, so that we can bypass the system proxy.

Edit for clarification: I'm using C#.

### Have you considered any alternatives or workarounds?

A possible workaround is to set HttpClient.DefaultProxy, but this might cause a problem if other parts of the code rely on the system proxy settings.