otp 28

[andreineculau]

No description provided.

[Copilot]

Pull Request Overview

This PR adds version-specific test behavior for Erlang/OTP 28, implementing conditional compilation to handle regex pattern matching differences between OTP versions.

• Adds conditional compilation directives to test different regex behaviors for OTP 28 vs earlier versions
• Updates test descriptions to escape backslashes properly in test names
• Modifies expected test outcomes for regex pattern matching without 'ucp' option based on OTP version

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