fix: use same protocol when forming endpoint links

[bodom0015]

Problem

When forming links, Workbench appears to use the Kubernetes endpoint protocol (may always be HTTP)

In prod (and localdev), we should prefer HTTPS

Approach

• fix: use the same protocol that is set on the root frontend domain when forming endpoint links

How to Test

1. Checkout and run this branch locally (see workbench-helm-chart)
2. Navigate to https://kubernetes.docker.internal/ (ignore browser certificate warnings)
3. Login/register with Keycloak
   • You should be brought back to the Workbench, now logged in
4. Add an application from the "All Apps"
   • You should be brought to "My Apps" to see your new app
5. Launch the application
   • You should see the application turn green when it is ready
6. Click the link to navigate to your app (ignore browser certificate warnings)
   • You should see the UI for your app load in the browser