Fix no space left error during e2e test setup (#3138)

* fix space issues for e2e test
* pin exact minor release of coveralls

.github/workflows/run_e2e.yaml

@@ -21,5 +21,12 @@ jobs:
       run: make codegen
     - name: Run unit tests
       run: make test
+    - name: Pre-pull heavy images directly on Kind nodes
+      run: |
+        FOR_NODE=$(kind get nodes --name postgres-operator-e2e-tests 2>/dev/null || true)
+        for node in $FOR_NODE; do
+          echo "Pulling Spilo image on node $node..."
+          docker exec "$node" crictl pull ghcr.io/zalando/spilo-18:4.1-p2
+        done
     - name: Run end-2-end tests
       run: make e2e

.github/workflows/run_tests.yaml

@@ -22,9 +22,9 @@ jobs:
     - name: Run unit tests
       run: go test -race -covermode atomic -coverprofile=coverage.out ./...
     - name: Convert coverage to lcov
-      uses: jandelgado/gcov2lcov-action@v1.1.1
+      uses: jandelgado/gcov2lcov-action@v1.2.0
     - name: Coveralls
-      uses: coverallsapp/github-action@master
+      uses: coverallsapp/github-action@v2.3.4
       with:
         github-token: ${{ secrets.GITHUB_TOKEN }}
-        path-to-lcov: coverage.lcov
+        file: coverage.lcov