fix: Use regex for test function name parsing in debugger build script

[GarmashAlex]

Description

This PR replaces the multiple .split() and .unwrap() calls used for parsing test function names in the debugger build script with a regex-based approach. The new implementation:

1. Adds a regex dependency to tooling/debugger/Cargo.toml
2. Uses a regex pattern to extract function names that handles generics and arguments properly
3. Maintains a fallback to the old method for backward compatibility

This makes the test function name parsing more robust and maintainable, while avoiding potential panic situations when parsing complex function signatures.

Problem*

Fix issue #8352

Additional Context

The previous implementation was using a series of string splits and unwraps which could fail when dealing with more complex function signatures. The regex approach provides a cleaner and more reliable solution.

Documentation*

Check one:

• No documentation needed.
• Documentation included in this PR.
• [For Experimental Features] Documentation to be submitted in a separate PR.

PR Checklist*

• I have tested the changes locally.
• I have formatted the changes with Prettier and/or cargo fmt on default settings.

[github-actions]

Thank you for your contribution to the Noir language.

Please do not force push to this branch after the Noir team have started review of this PR. Doing so will only delay us merging your PR as we will need to start the review process from scratch.

Thanks for your understanding.

[TomAFrench]

Is this completely AI generated?

[GarmashAlex]

Is this completely AI generated?

Most of this :( Sorry... I was trying to find a useful way to contribute.

[TomAFrench]

We have a policy of not accepting PRs which consist entirely of LLM output due to the fact that it ends up functionally being a DOS on maintainers because we then need to do all the checking which would otherwise be done by the author (as shown by this PR keeping the old method as a fallback).

I'm sorry but I'm going to close this PR.