Streamline E2E test workflow by removing explicit Rollup installation and updating npm ci command

Author: Lukecsharpwalker

.github/workflows/e2e-tests.yml

@@ -17,7 +17,13 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with: { node-version: 20, cache: npm }
-      - run: npm ci --omit=optional
+      - run: npm ci
+      - run: |
+          node - <<'NODE'
+          const v = require('./package.json').devDependencies.rollup ?? 'latest';
+          console.log('ℹ Installing native Rollup helper for', v);
+          NODE
+      - run: npm install --no-save @rollup/rollup-linux-x64-gnu@$(node -p "require('./package.json').devDependencies.rollup || '4'")
 
       - uses: supabase/setup-cli@v1
         with: { version: 2.24.3 }