[Fix] Re-add node-polyfill to frontend bundle

[sauntimo]

✏️ Changes

• I removed the node polyfill from the frontend bundle as it seemed that the crypto and stream modules it was added to replace weren't actually being used on the frontend. However, whilst they aren't used directly, they are used indirectly. So, I'm adding it back in. This does increase the size of the ui.js file to about 1.8mb however this is okay and should be deployed just fine.

🔗 References

• n/a

🎯 Testing

• ✅ 40/40 integration tests passing against a layer0 dev space
• ✅ 145/145 unit tests passing locally
• ✅ tested in iam-authz-extensionupgrade2 space manually with demozero

🚀 Deployment

✅ This can be deployed any time

🎡 Rollout

In order to verify that the deployment was successful we will test in a prod space both before and after we make this version available to customers.

🔥 Rollback

If there are issues with this version we will follow the disaster recovery plan for the authz extension.