bug: Tunneling does not work

[mjudeikis]

Describe the bug

After split from KCP core tunneling does not work.
We need to backport the code to make reverse tunnels working

https://github.com/kcp-dev/kcp/blob/main-pre-tmc-removal/pkg/tunneler/dialer.go
https://github.com/kcp-dev/kcp/blob/main-pre-tmc-removal/pkg/server/config.go

Steps To Reproduce

Follow the readme to deploy kuard application and see the logs of the syncer

Expected Behaviour

tunnels works

Additional Context

No response

[mjudeikis]

This needs to be re-enabled #13