Show variants in uv pip list

[charliermarsh]

Summary

Looks like:

Package Version Variant
------- ------- ----------
numpy   2.3.3   accelerate
scipy   1.16.2  accelerate

Closes #16086.

[codspeed-hq]

CodSpeed Instrumentation Performance Report

Merging #16091 will degrade performances by 23.49%

_{Comparing charlie/wheel-variant-pip-list (bec7fc7) with main (d51a1e7)¹}

Summary

❌ 2 regressions
✅ 1 untouched

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
❌	resolve_warm_airflow	760.3 ms	867 ms	-12.3%
❌	resolve_warm_jupyter_universal	204 ms	266.6 ms	-23.49%

Footnotes

1. No successful run was found on charlie/wheel-variant (072866b) during the generation of this report, so main (d51a1e7) was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩