Add many more services and test scenarios to the workload proxying feature:
- Use two clusters, a 1+1 and a 1+2.
- Use multiple nginx workloads.
- Each workload serving its name in its `index.html` and it being asserted (i.e., we assert that we hit the correct service).
- Multiple exposed services per workload.
- Multiple parallel requests per exposed service.
- Toggle the feature off and on, assert service accessibility.
- Toggle an exposed service off and on by removing/readding the k8s service annotation, assert accessibility.
- Test explicit prefixes.
Additionally:
- Fix two bugs in workload services:
- Check the cookies before returning 404 for a non-existing exposed service prefix.
- Add timeouts to `inmem` proxy transport, so requests do not potentially hang forever.
- Bring back the logic the saving of a support bundle when an integration test fails, and fix its save path.
Signed-off-by: Utku Ozdemir <utku.ozdemir@siderolabs.com>
