refactor(docs-infra): refactors createOverviewDump (angular#37141)

This commit removes the dependency on the `lodash` module and refactors
the `createOverviewDump` method.

PR Close angular#37141

Author: sonukapoor

aio/tools/transforms/angular.io-package/processors/createOverviewDump.js

@@ -1,23 +1,23 @@
-var _ = require('lodash');
-
 module.exports = function createOverviewDump() {
 
   return {
     $runAfter: ['processing-docs'],
     $runBefore: ['docs-processed'],
     $process: function(docs) {
-      var overviewDoc = {
+      const overviewDoc = {
         id: 'overview-dump',
         aliases: ['overview-dump'],
         path: 'overview-dump',
         outputPath: 'overview-dump.html',
         modules: []
       };
-      _.forEach(docs, function(doc) {
+
+      docs.forEach(doc => {
         if (doc.docType === 'package') {
           overviewDoc.modules.push(doc);
         }
       });
+
       docs.push(overviewDoc);
     }
   };