Install pip and wheel early

We use pip and wheel in some of the extra packages early on in the
action so install them before any python installs happen so they
are available everywhere.

.github/workflows/build.yaml

@@ -26,6 +26,13 @@ jobs:
       - name: Install postgresql (server)
         run: sudo apt install postgresql
 
+      # pip is pinned because of urllib pinning because of moto bug with
+      # responses
+      - name: Update pip/wheel infrastructure
+        run: |
+          python -m pip install --upgrade pip==20.2.4
+          pip install wheel
+
       - name: Install postgresql Python packages
         run: pip install psycopg2 testing.postgresql
 
@@ -37,7 +44,6 @@ jobs:
 
       - name: Install dependencies
         run: |
-          python -m pip install pip==20.2.4
           pip install -r requirements.txt
 
       # We have two cores so we can speed up the testing with xdist