Addedv1.11.5-rancher1-2: support ipvs proxy mode

[gitlawr]

Address issue: rancher/rancher#15718
Added a boolean switch for activating ipvs proxy mode for kube-proxy
It adds --proxy-mode=ipvs and -v /lib/modules:/lib/modules:ro to kube-proxy service when enabled.

[alena1108]

@gitlawr can you split the commit into 2? One containing the files copy, the other - actual changes to the template

[gitlawr]

@alena1108 Sure, updated.

[gitlawr]

NB This PR is depending on adding ipset utility to the k8s image: rancher/kubernetes-package#169

[deniseschannon]

@gitlawr with the most recent patch releases, we need to add a new folder 55. can you split up with 2 commits (1 commit for a copy of folder 53 to 55) and then the changes that you made?

[gitlawr]

Updated

[gitlawr]

Rebased to the new 55 template.