chore(ci): enable spread tests on CI

.github/workflows/build-rock.yaml

@@ -33,5 +33,5 @@ jobs:
       - name: Upload rock
         uses: actions/upload-artifact@v4
         with:
-          name: snapcraft-${{ steps.vars.outputs.rockname }}.rock
+          name: snapcraft-rock
           path: '*.rock'

.github/workflows/spread.yaml

@@ -0,0 +1,33 @@
+name: Spread
+on:
+  pull_request:
+    branches:
+      - 'core2[24]-[78]'
+  push:
+    branches:
+      - 'core2[24]-[78]'
+
+jobs:
+  spread-tests:
+    runs-on: self-hosted
+
+    steps:
+      - name: Cleanup job workspace
+        run: |
+          rm -rf "${{ github.workspace }}"
+          mkdir "${{ github.workspace }}"
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          submodules: true
+      - name: Download rock artifact
+        id: download-artifact
+        uses: dawidd6/action-download-artifact@v3
+        with:
+          workflow: build-rock.yaml
+          workflow_conclusion: success
+          name: snapcraft-rock
+          path: tests
+      - name: Run spread
+        run: spread