Make the test actually fail 🤦‍♂️

Author: davidwengier

src/Razor/test/Microsoft.AspNetCore.Razor.Test.Common.Tooling/Logging/TestOutputLogger.cs

@@ -18,6 +18,11 @@ public bool IsEnabled(LogLevel logLevel)
 
     public void Log(LogLevel logLevel, string message, Exception? exception)
     {
+        if (logLevel == LogLevel.Error)
+        {
+            throw exception ?? new InvalidOperationException(message);
+        }
+
         if (!IsEnabled(logLevel))
         {
             return;