[Wizard] Fix validation within GoToNextStepAsync method

[bejulian]

Pull Request

📖 Description

This PR fixes an issue of the validation behavior of GoToNextStepAsync(int, true) in FluentWizard as described in #2939.

🎫 Issues

Fixes #2939

✅ Checklist

General

• I have added tests for my changes.
• I have tested my changes.
• I have updated the project documentation to reflect my changes.
• I have read the CONTRIBUTING documentation and followed the standards for this project.

Component-specific

• I have added a new component
• I have added Unit Tests for my new component
• I have modified an existing component
• I have validated the Unit Tests for an existing component