rust: Add support for doctest runnables (#24806)

Screenshot:


![image](https://github.com/user-attachments/assets/0ac88029-76c1-4135-bef2-373636e3587d)

I would be happy to add tests if you point me to the right place to do
it please.

Release Notes:

- Added support for doc test in tasks for Rust

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Signed-off-by: Benjamin <5719034+bnjjj@users.noreply.github.com>