Possibility to remove SSH access

[jerome-jutteau]

Explain problem to solve

As an administrator, I would like to avoid any possibility to be authenticated through SSH service on nodes.

Describe the solution you would like

Not specifying a keypair will not create one and will run nodes without a keypair specified

Additional context

None

Environment

- Kubernetes version: (use `kubectl version`): v1.22.5-rancher1-1
- OS (e.g. from `/etc/os-release`): CentOS Linux 7 (Core)
- Kernel (e.g. `uname -a`): 3.10.0-1160.15.2.el7.x86_64
- cluster-api-provider-outscale version: v1.1.3
- cluster-api version: current
- Install tools: calico, ingress-nginx, osc-ccm
- Kubernetes Distribution: rke
- Kubernetes Distribution version: v1.3.4