test, ci: Playwright config tweaks, update action versions (#1401)

Author: askoufis

.github/workflows/validate.yml

@@ -20,7 +20,7 @@ jobs:
       - uses: pnpm/action-setup@v3
 
       - name: Set up Node.js
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node }}
           node-version-file: ${{ matrix.node == '' && '.nvmrc' || '' }}

playwright.config.ts

@@ -14,6 +14,8 @@ const config: PlaywrightTestConfig = defineConfig({
     },
   },
   workers: process.env.CI ? cpus().length : undefined,
+  retries: process.env.CI ? 2 : 0,
+  forbidOnly: !!process.env.CI,
   snapshotDir: 'tests/e2e/snapshots',
   // put all snapshots in one directory
   // https://playwright.dev/docs/api/class-testconfig#test-config-snapshot-path-template