Forward StatusCode to HttpRequestException whenever possible

[antonfirsov]

Following up on #105610 & #105546, I found a few othe places where StatusCode could be forwarded, there might be more.

runtime/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/ConnectionPool/HttpConnectionPool.cs

Line 537 in 7ed15a2

throw new HttpRequestException(HttpRequestError.VersionNegotiationError, SR.Format(SR.net_http_requested_version_server_refused, request.Version, request.VersionPolicy), e);

runtime/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/HttpConnection.cs

Line 2073 in 7ed15a2

throw new HttpRequestException(HttpRequestError.UserAuthenticationError, SR.net_http_authconnectionfailure);

runtime/src/libraries/System.Net.Http/src/System/Net/Http/SocketsHttpHandler/HttpConnection.cs

Line 2089 in 7ed15a2

throw new HttpRequestException(HttpRequestError.UserAuthenticationError, SR.net_http_authconnectionfailure);

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