.github: Pre-pull images before running integration tests

This help not hitting some test timeouts due to images not being pulled
quickly enough.

Signed-off-by: Beñat Gartzia Arruabarrena <bgartzia@redhat.com>

Author: bgartzi

.github/workflows/integration-tests.yml

@@ -72,6 +72,8 @@ jobs:
         run: make push
       - name: "Install KubeVirt"
         run: make install-kubevirt
+      - name: "Pre-pull images"
+        run: make pre-pull-images
       - name: "Run integration tests"
         run: |
           eval $(ssh-agent -s)