ci: use uv to install dependencies

[skshetry]

• ❗ I have followed the Contributing to DVC checklist.

• 📖 If this PR requires documentation updates, I have created a separate PR (or issue, at least) in dvc.org and linked it here.

Thank you for the contribution - we'll try to review it as soon as possible. 🙏

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.58%. Comparing base (8f50f25) to head (b26e5dd).
Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #10507      +/-   ##
==========================================
+ Coverage   90.27%   90.58%   +0.31%     
==========================================
  Files         481      503      +22     
  Lines       36003    39129    +3126     
  Branches     4768     5647     +879     
==========================================
+ Hits        32502    35446    +2944     
- Misses       2903     3008     +105     
- Partials      598      675      +77     

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