Upgrade pip before installing zuul

The new cryptography release needs either a recent pip to be able to
use abi3 wheels or a rust compiler on the system to make the source
installation work. Thus upgrade pip to use the wheels.

Change-Id: Ied6007f9f834f313063e2e56a057a7082a71e5c4

playbooks/zuul-stream/pre.yaml

@@ -13,7 +13,9 @@
   post_tasks:
 
     - name: Install software
-      command: python3 -m pip install src/opendev.org/zuul/zuul
+      shell: |+
+        python3 -m pip install --upgrade pip setuptools wheel
+        python3 -m pip install src/opendev.org/zuul/zuul
       become: yes
 
     - name: Install managed ansible versions