Add token selection for 3.3

[ibexa-yuna]

No description provided.

[Copilot]

Pull Request Overview

This PR adds conditional token selection logic for version 3.3 in the GitHub Actions workflow. It modifies the browser tests workflow to use different authentication tokens based on whether the project version contains "3.3".

• Adds conditional execution to prevent GitHub App token generation for version 3.3
• Updates existing composer key setup to exclude version 3.3
• Introduces separate composer key setup step specifically for version 3.3 using a different token

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[micszo]

Tested in linked PRs.