Ensure Pip3 is installed.

Use apt to install python3-pip, and use pip3 in event system has
both pip2 and pip3 installed.

Change-Id: I5a0eea3e06e2e9d135bb63cc35c3d281abd1ca10

tools/gate/playbooks/airskiff-deploy.yaml

@@ -24,6 +24,15 @@
         name: systemd-resolved
       become: yes
 
+    - name: ensure pip3 is installed
+      apt:
+        name: "{{ item }}"
+      with_items:
+        - python3-pip
+        - python3-setuptools
+      when: ansible_os_family == 'Debian'
+      become: true
+
     - name: Clone Required Repositories
       shell: |
         export CLONE_ARMADA={{ CLONE_ARMADA }}