Reduce e2e app to only 1 app

[davidlj95]

Instead of maintaining 3 separate apps. This generates noise when updating dependencies:

• More files changed (though dependencies are updated in groups thanks to Renovate)
• Dependabot generates 1 PR for each dependency when security alerts PRs are raised

https://github.com/ngworker/angular-versions-action?tab=readme-ov-file looks interesting

[davidlj95]

Done in #504