common: bump @playwright/test to 1.60.0

[pnts-se-whereby]

Description

Summary: Bumps @playwright/test from ^1.50.1 to ^1.60.0 in apps/sample-app (matches pwa). Revert node 24.15.0 pin in CI workflows, they now read from .nvmrc again.

Related Issue:

Testing

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Checklist

• My code follows the project's coding standards.
• Prefixed the PR title and commit messages with the service or package name
• I have written unit tests (if applicable).
• I have updated the documentation (if applicable).
• By submitting this pull request, I confirm that my contribution is made
  under the terms of the MIT license.

Additional Information

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