Make loading of bundled plugins working and robust

Summary:
Bundled plugins so far didn't load because the defaultPlugins was not generated yet. Fixed follow up errors that resulted from node modules not being available in the browser, and made the process more robust so that one plugin that fails to initialise doesn't kill all bundled plugins from being loaded.

Cleaned up the server scripts, and reused the BUILTINS list that is already maintained in the babel transformer.

Report errors during the build process if modules are referred that are stubbed out (later on we could maybe error on that)

Reviewed By: aigoncharov

Differential Revision: D33020243

fbshipit-source-id: 3ce13b0049664b5fb19c1f45f0b33c1d7fdbea4c

desktop/flipper-ui-core/src/dispatcher/plugins.tsx

@@ -293,6 +293,11 @@ const requirePluginInternal = async (
   let plugin = pluginDetails.isBundled
     ? defaultPluginsIndex[pluginDetails.name]
     : await getRenderHostInstance().requirePlugin(pluginDetails.entry);
+  if (!plugin) {
+    throw new Error(
+      `Failed to obtain plugin source for: ${pluginDetails.name}`,
+    );
+  }
   if (isSandyPlugin(pluginDetails)) {
     // Sandy plugin
     return new _SandyPluginDefinition(pluginDetails, plugin);