Update ConnectionService.cs to allow on-prem ports with OAuth, otherwise options for on-prem OAuth service client are very limited

On-prem deployment very often use non-standard ports like 444

Author: korytiak

src/GeneralTools/DataverseClient/Client/ConnectionService.cs

@@ -1471,7 +1471,7 @@ private async Task<IOrganizationService> DoDirectLoginAsync(bool IsOnPrem = fals
 
             IOrganizationService dvService = null;
             Uri OrgWorkingURI = null;
-            if (!IsOnPrem || _eAuthType == AuthenticationType.OAuth) // Use this even if its onPrem, when auth type == oauth. 
+            if (!IsOnPrem)
             {
                 OrgWorkingURI = new Uri(string.Format(SoapOrgUriFormat, _targetInstanceUriToConnectTo.Scheme, _targetInstanceUriToConnectTo.DnsSafeHost));
             }