overrides: add gdspy, gdstk, update marshmallow, fix pillow 9.5.0

[KoviRobi]

Contribution checklist (recommended but not always applicable/required):

• There's an automated test for this change
• Commit messages or code include references to related issues or PRs (including third parties)
• Commit messages are conventional - examples from the log include "feat: add changelog files to fixup hook", "fix(contourpy): allow wheel usage", and "test: add sqlalchemy2 test"

The marshmallow one, it now has both flit-core and setuptools, I saw some other code above having both, thought that's probably simpler (might result in an extra unnecessary download/build, but probably not a big problem), than selecting based on version.

The pillow fix should help #1139

Notes

From the README.md

• This project uses nixpkgs-fmt for formatting the Nix code. You can use nix-shell --run "nixpkgs-fmt ." to format everything.

Seems like there are a couple of unformatted things, when I ran this -- I only used the formatting on the newly added lines, to avoid noise.

[cpcloud]

Passing locally for me on {x86_64,aarch64}-darwin,x86_64-linux, merging.