fix: do not screenshot the same page again in afterAll

[dgozman]

Fixes #34996.

[github-actions]

Test results for "tests 1"

5 flaky

⚠️ [firefox-page] › tests/page/page-evaluate.spec.ts:403:3 › should throw for too deep reference chain @firefox-ubuntu-22.04-node18
⚠️ [playwright-test] › tests/ui-mode-test-watch.spec.ts:145:5 › should watch all @macos-latest-node18-1
⚠️ [playwright-test] › tests/ui-mode-test-output.spec.ts:80:5 › should show console messages for test @ubuntu-latest-node22-1
⚠️ [webkit-page] › tests/page/page-screenshot.spec.ts:345:5 › page screenshot › should work while navigating @webkit-ubuntu-22.04-node18
⚠️ [playwright-test] › tests/ui-mode-test-watch.spec.ts:145:5 › should watch all @windows-latest-node18-1

38659 passed, 803 skipped
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Merge workflow run.