images/k8s-infra: Add rclone
images/k8s-infra: Add rclone

- Install [rclone](https://rclone.org)
- remove usage of apt-key for package installation

Signed-off-by: Arnaud Meukam <96190fcd0798f0afa72279990e31ddc33e4f2ea2@gmail.com>

kubernetes/k8s.io,kubernetes/k8s.io,kubernetes/k8s.io,kubernetes/k8s.io