Disable settings synchronization for integration testing

src/VisualStudio/IntegrationTest/TestUtilities/VisualStudioInstanceFactory.cs

@@ -323,6 +323,9 @@ private static Process StartNewVisualStudioProcess(string installationPath, int
                 Process.Start(vsExeFile, $"/updateconfiguration {VsLaunchArgs}").WaitForExit();
                 Process.Start(vsExeFile, $"/resetsettings General.vssettings /command \"File.Exit\" {VsLaunchArgs}").WaitForExit();
 
+                // Disable roaming settings to avoid interference from the online user profile
+                Process.Start(vsRegEditExeFile, $"set \"{installationPath}\" {Settings.Default.VsRootSuffix} HKCU \"ApplicationPrivateSettings\\Microsoft\\VisualStudio\" RoamingEnabled string \"1*System.Boolean*False\"").WaitForExit();
+
                 _firstLaunch = false;
             }