ci: More fixes to eventually generate a diff for QNS results (#1867)

* ci: Generate a diff for QNS results

WIP

* Always store local docker image

.github/workflows/qns.yml

@@ -60,7 +60,6 @@ jobs:
           platforms: 'linux/amd64, linux/arm64'
 
       - uses: docker/build-push-action@2cdde995de11925a030ce8070c3d77a52ffcf1c0 # v5.3.0
-        if: github.event_name == 'pull_request'
         id: docker_build_and_push
         with:
           tags: ${{ steps.meta.outputs.tags }}
@@ -72,7 +71,6 @@ jobs:
           outputs: type=docker,dest=/tmp/${{ env.LATEST }}.tar
 
       - uses: actions/upload-artifact@65462800fd760344b1a7b4382951275a0abb4808 # v4.3.3
-        if: github.event_name == 'pull_request'
         with:
           name: '${{ env.LATEST }} Docker image'
           path: /tmp/${{ env.LATEST }}.tar
@@ -148,7 +146,6 @@ jobs:
           client: ${{ steps.depair.outputs.client }}
           server: ${{ steps.depair.outputs.server }}
           implementations: ${{ needs.implementations.outputs.implementations }}
-          test: handshake,transfer
 
   report:
     name: Report results
@@ -226,10 +223,10 @@ jobs:
             fi
             echo "<details><summary>All results</summary>"
             echo
-            echo "[QUIC Interop Runner](https://github.com/quic-interop/quic-interop-runner), *client* vs. *server*"
             for GROUP in succeeded unsupported; do
               echo "### ${GROUP^} Interop Tests"
               if [ -e "$GROUP.md" ]; then
+                echo "[QUIC Interop Runner](https://github.com/quic-interop/quic-interop-runner), *client* vs. *server*"
                 cat "$GROUP.md"
               else
                 echo "None :question:"