Revert "chore: upgrade to node 18" (#34496)

* Revert "chore: upgrade to node 18"

* Revert "fix: bump npm from 10.2.x to 10.5.x"

This reverts commit b6662d4ee0.

* Revert "fix: replace outdated webpack plugins"

This reverts commit b204f1b572.

* Revert "build: Remove the `npm bin` calls from package.json"

This reverts commit 4e3dd161ff.

* fix: fix bad conflict resolution.

---------

Co-authored-by: Diana Huang <dkh@edx.org>

webpack.dev.config.js

@@ -58,7 +58,7 @@ module.exports = _.values(Merge.smart(commonConfig, {
             ]
         },
         watchOptions: {
-            ignored: ['/node_modules/', '/\.git/']
+            ignored: [/node_modules/, /\.git/]
         }
     }
 }));