Stable order for virtual packages

[konstin]

uv gives priorities to packages by package name, not by virtual package (PubGrubPackage). pubgrub otoh when prioritizing order the virtual packages. When the order of virtual packages changes, uv changes its resolutions and error messages. This means uv was depending on implementation details of pubgrub's prioritization caching.

This broke with pubgrub-rs/pubgrub#299, which added a tiebreaker term that made pubgrub's sorting deterministic given a deterministic ordering of allocating the packages (which happens the first time pubgrub sees a package).

The new custom tiebreaker decreases the difference to upstream pubgrub.

[konstin]

For transformers, the difference comes from fsspec and datasets being mutually incompatible. Using just the two packages as input we can coerce both versions, which now appear in different, hence the slightly larger lockfile.

8,9c8,9
< datasets==2.20.0
< dill==0.3.8
---
> datasets==2.14.4
> dill==0.3.7
12c12
< fsspec==2024.5.0
---
> fsspec==2024.6.1
16c16
< multiprocess==0.70.16
---
> multiprocess==0.70.15
21d20
< pyarrow-hotfix==0.6