fix: dependencies package PEP508 markers selection

[jamesdbrock]

Bugfix: support local .whl files with dependency markers.

Maybe resolves #1174

2 commits:

1. Add 2 tests. Both tests are disabled for the case of x86_64-darwin.

   • Remote .whl dependency marker selection mk-poetry-packages-partition-whl-remote On this commit the test succeeds because poetry2nix can select dependency markers for remote .whl files.

   • Local .whl dependency marker selection mk-poetry-packages-partition-whl-local On this commit the test fails because poetry2nix cannot select dependency markers for local .whl files.

     Add three local watchdog.whl files (79kB, 79kB, 96kB) to the repository. We chose watchdog because it distributes separate .whl files for each platform and the files are small.

2. fix: dependencies package PEP508 markers selection.
   With this commit the second test mk-poetry-packages-partition-whl-local succeeds because now poetry2nix can select dependency markers for local .whl files.

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"

[jamesdbrock]

Who is merging PRs on this repo these days, is it @Nebucatnetzer ? Thank you very much for your maintenance work.

This PR might be controversial because it adds 3 .whl binary files to the repo. I'm willing to negotiate about that.

[Nebucatnetzer]

I can merge stuff but that mostly involves the pull requests for override updates and similar minor stuff.

I honestly don't know the pros and cons of including the wheels here.
Maybe they could be included with something like fetchurl?

When you write Maybe resolves #1174 what makes you unsure about?
I guess you tested it?

[Nebucatnetzer]

Maybe @elikoga has some inputs?

[elikoga]

I was initially a bit confused because the diff changes a read for .marker to .markers but it seems like the poetry lock format uses markers, as shown in the patch.

I'd look into why we accessed .marker before or wether that was just buggy code.

I'm not sure about adding the wheels to the repo. They are small (all less than 100kb as far as I see) so it's not that bad.