fix: retryFailedStep plugin works in debug/verbose mode

[mirao]

Fixed by VSCode Copilot with Claude Sonnet 4.

Personally I checked that the added unit test fails as expected before the fix.

Motivation/Description of the PR

• Remove debugMode check that prevented retries when --verbose or --debug flags are used
• Fix affects both retryFailedStep and enhancedRetryFailedStep plugins
• Add regression test to ensure retries work correctly in debug mode
• Resolves issue where plugin was disabled in debug mode without clear reason

Fixes #4384

Applicable helpers:

• [ ] Playwright
• [ ] Puppeteer
• [ ] WebDriver
• [ ] REST
• [ ] FileHelper
• [ ] Appium
• [ ] TestCafe

Applicable plugins:

• [ ] allure
• [ ] autoDelay
• [ ] autoLogin
• [ ] customLocator
• [ ] pauseOnFail
• [ ] coverage
• [x] retryFailedStep
• [ ] screenshotOnFail
• [ ] selenoid
• [ ] stepByStepReport
• [ ] stepTimeout
• [ ] wdio
• [ ] subtitles

Type of change

• [ ] :fire: Breaking changes
• [ ] :rocket: New functionality
• [x] :bug: Bug fix
• [ ] 🧹 Chore
• [ ] :clipboard: Documentation changes/updates
• [ ] :hotsprings: Hot fix
• [ ] :hammer: Markdown files fix - not related to source code
• [ ] :nail_care: Polish code

Checklist:

• [x] Tests have been added
• [ ] Documentation has been added (Run npm run docs)
• [x] Lint checking (Run npm run lint)
• [x] Local tests are passed (Run npm test)