[full-ci][tests-only] Increase playwright timeout

[prashant-gurung899]

Description

This PR updates the playwright timeout to fix the flaky test failure in nightly build as per the discusion in opencloud-eu/qa#68

Related Issue

• Fixes [QA] e2e test failure in web nightly qa#68

How Has This Been Tested?

• 🤖

Types of changes

• Bugfix
• Enhancement (a change that doesn't break existing code or deployments)
• Breaking change (a modification that affects current functionality)
• Technical debt (addressing code that needs refactoring or improvements)
• Tests (adding or improving tests)
• Documentation (updates or additions to documentation)
• Maintenance (like dependency updates or tooling adjustments)

[Copilot]

Pull Request Overview

This PR increases the default Playwright timeout from 60 to 120 seconds to address flaky test failures in the nightly build.

• Doubles the default timeout value to improve test stability
• Maintains environment variable override capability

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