Log and throw error on initialization (#5156)

Author: pragnagopa

src/WebJobs.Script.WebHost/App_Start/WebHostResolver.cs

@@ -202,6 +202,7 @@ internal void EnsureInitialized(WebHostSettings settings)
             {
                  var errorEventId = new EventId(103, "HostInitializationError");
                 _logger.LogError(errorEventId, initializationException, "Failed to initialize host");
+                throw;
             }
         }