[IDS-5274] Chore: Update fsevents

[sauntimo]

✏️ Changes

• Overrides fsevents 1.x to use latest version 2.3.3.
• Adds webpack-bundle-analyzer which is useful for understanding bundle sizes.
• removes node-polyfill-webpack-plugin which is only required for the backend build, and so only needs to be installed in auth0-extensions-cli repo. Removing it from the frontend webpack config reduces the ui bundle significantly.

Note: This had to be fixed with #401 to re-add the node polyfill.

🔗 References

• Jira: https://auth0team.atlassian.net/browse/IDS-5274
• Sec ticket: https://auth0team.atlassian.net/browse/SEC-2164

🎯 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.