Convert hack/install.sh to use arkade for system packages

[alexellis]

Now that arkade has system level packages for CNI, containerd and Go, we can update hack/install.sh and simplify it.

https://github.com/alexellis/arkade/releases/tag/0.8.23

alexellis/arkade#654

Expected Behaviour

Use

arkade system install \
  containerd --version $CONTAINERD_VERSION

Current Behaviour

install_containerd() {
  arch=$(uname -m)
  CONTAINERD_VER=1.6.2
  case $arch in
  x86_64 | amd64)
    curl -sLSf https://github.com/containerd/containerd/releases/download/v${CONTAINERD_VER}/containerd-${CONTAINERD_VER}-linux-amd64.tar.gz | $SUDO tar -xvz --strip-components=1 -C /usr/local/bin/
    ;;
  armv7l)
    curl -sSL https://github.com/alexellis/containerd-arm/releases/download/v${CONTAINERD_VER}/containerd-${CONTAINERD_VER}-linux-armhf.tar.gz | $SUDO tar -xvz --strip-components=1 -C /usr/local/bin/
    ;;
  aarch64)
      curl -sLSf https://github.com/containerd/containerd/releases/download/v${CONTAINERD_VER}/containerd-${CONTAINERD_VER}-linux-arm64.tar.gz | $SUDO tar -xvz --strip-components=1 -C /usr/local/bin/

    ;;
  *)
    fatal "Unsupported architecture $arch"
    ;;
  esac

  $SUDO systemctl unmask containerd || :
  $SUDO curl -SLfs https://raw.githubusercontent.com/containerd/containerd/v${CONTAINERD_VER}/containerd.service --output /etc/systemd/system/containerd.service
  $SUDO systemctl enable containerd
  $SUDO systemctl start containerd

  sleep 5
}

Context

Reduces duplication

Your Environment

Must continue to work for armhf, 64-bit ARM and x86_64 after the changes.

[nitishkumar71]

I will work on this.