bug: Infinite scroll - scrolling to the top test is flaky on CI with Safari

- This [test](https://github.com/ionic-team/ionic-framework/blob/c63ec2e98db0ca1ce8ad15b5aa9cd5fe4732701a/core/src/components/infinite-scroll/test/top/infinite-scroll.e2e.ts#L6) is flaky only with Safari and on [CI](https://github.com/ionic-team/ionic-framework/actions/runs/13893653439/job/38891710657?pr=30259)

- This might be related to the latest [Playwright upgrade](https://github.com/ionic-team/ionic-framework/pull/29840)

- [CI test result](https://github.com/ionic-team/ionic-framework/actions/runs/13893653439/job/38891710657?pr=30259)

- Trace: [test-results-16-20.zip](https://github.com/user-attachments/files/20430859/test-results-16-20.zip)

Start with core/src/components/infinite-scroll/test/top/infinite-scroll.e2e.ts, especially the scrolling-to-the-top test, and review the linked CI result and trace for Safari-specific failures. Compare the behavior with the Playwright upgrade in pull request 29840. Done means the test no longer flakes on Safari in CI while still checking infinite-scroll behavior.

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