[HttpListener] [Managed] HttpListenerRequest should throw an InvalidOperationException calling certificate APIs after not finishing BeginGetClientCertificate

[hughbe]

[ConditionalFact(nameof(Helpers) + "." + nameof(Helpers.IsWindowsImplementation))]
public async Task ClientCertificateError_GetWhileGettingCertificate_ThrowsInvalidOperationException()
{
    await GetRequest("POST", null, null, (_, request) =>
    {
        request.BeginGetClientCertificate(null, null);
        Assert.Throws<InvalidOperationException>(() => request.ClientCertificateError);
        Assert.Throws<InvalidOperationException>(() => request.BeginGetClientCertificate(null, null));
        Assert.Throws<InvalidOperationException>(() => request.GetClientCertificate());
    });
}