calico: use absolute path to docker, crictl binary (#6253)

To avoid the following error (ignored when pipefail is off)

  RUNNING HANDLER [network_plugin/calico : containerd | delete calico-node containers] *******************************************************************************
  changed: [node1] => {"attempts": 1, "changed": true, "cmd": "crictl pods --name calico-node-* -q | xargs -I% --no-run-if-empty bash -c \"crictl stopp % && crictl rmp %\"", "delta": "0:00:00.004240", "end": "2020-06-10 03:32:41.316955", "rc": 0, "start": "2020-06-10 03:32:41.312715", "stderr": "/bin/sh: crictl: command not found", "stderr_lines": ["/bin/sh: crictl: command not found"], "stdout": "", "stdout_lines": []}