Fix cilium to use k3s paths for binPath and confPath v2

[prehor]

Cilium incorrectly uses the /etc/cni/net.d and /opt/cni/bin directories in the node filesystem instead of the corresponding directories in /var/lib/rancher/k3s.

Fixes PR #1381 where links /etc/cni/net.d and /opt/cni/bin to the corresponding directories in /var/lib/rancher/k3s were missing.

[onedr0p]

@prehor were you able to test this on a new debian and cluster install?

I am also trying to understand what is the reason for not just using the system paths of /etc/cni/net.d and /opt/cni/bin, what problem are you trying to solve?

[prehor]

I tested it on a new cluster installation. Later (hopefully this week) I'll be able to test it on a fresh Debian install.

k3s now includes core CNI plugins. In the next version of k3s v1.29.4, Multus and a lot of other CNI plugins should be added (k3s-io/k3s#9710) so that they no longer need to be installed manually.

[onedr0p]

Sounds good, I went ahead and marked this PR as a draft. Please switch it back when you have time to test. Thanks!

[prehor]

I tested it successfully on a fresh Debian and on a three node cluster. I continue with Multus.

[onedr0p]

Sounds good, hopefully other people do not have issues.