Add warning to web cmdlets if it defaults to HTTP #19316

Summary of the new feature / enhancement

In WebRequestPSCmdlet.Common.cs line 1399 if we provide a -Uri with no scheme it defaults to http, is this the desired behaviour in 2023? Discussed with Ilya (@iSazonov) in #19162 comments

        private static Uri CheckProtocol(Uri uri)
        {
            ArgumentNullException.ThrowIfNull(uri);

            return uri.IsAbsoluteUri ? uri : new Uri("http://" + uri.OriginalString);
        }

Test:

$x = Invoke-WebRequest google.com
$x.BaseResponse.RequestMessage.RequestUri.Scheme
#--> http

Proposed technical implementation details (optional)

http --> https