gha: run & upload must-gather

Signed-off-by: Jakob Naucke <jnaucke@redhat.com>
Assisted-by: AI

Author: Jakob-Naucke

.github/workflows/integration-tests.yml

@@ -76,3 +76,14 @@ jobs:
         run: |
           eval $(ssh-agent -s)
           make integration-tests
+      - name: "Gather must-gather"
+        if: always()
+        run: must-gather/gather
+        env:
+          COLLECTION_PATH: must-gather-output
+      - name: "Upload must-gather"
+        if: always()
+        uses: actions/upload-artifact@v7
+        with:
+          name: must-gather
+          path: must-gather-output/