use SpecialFolder.UserProfile in few places (#43826)

Author: marcpopMSFT

src/Cli/Microsoft.TemplateEngine.Cli/Commands/CliPathInfo.cs

@@ -42,6 +42,7 @@ private static string GetUserProfileDir(IEnvironment environment) => environment
             RuntimeInformation.IsOSPlatform(OSPlatform.Windows)
                 ? "USERPROFILE"
                 : "HOME")
+            ?? Environment.GetFolderPath(Environment.SpecialFolder.UserProfile)
             ?? throw new NotSupportedException("HOME or USERPROFILE environment variable is not defined, the environment is not supported");
 
         private static string GetGlobalSettingsDir(string? settingsLocation)

src/RazorSdk/Tool/ServerProtocol/ServerConnection.cs

@@ -77,7 +77,7 @@ public static string GetTempPath(string workingDir)
                 }
             }
 
-            var userProfile = Environment.GetEnvironmentVariable("USERPROFILE");
+            var userProfile = Environment.GetFolderPath(Environment.SpecialFolder.UserProfile);
             if (Path.IsPathRooted(userProfile))
             {
                 return userProfile;