[3.11] Update name in acknowledgements and add mailmap (GH-103696) (#104002)

Update name in acknowledgements and add mailmap (GH-103696)

I changed my name last year, and would like to update my name in the
acknowledgements and git history accordingly.

git-mailmap reference: https://git-scm.com/docs/gitmailmap

(cherry picked from commit 4b10ecc29f6ae69e599a5475a62d8e96a8711f90)

Co-authored-by: Amethyst Reese <amethyst@n7.gg>
Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>