ci(uv): don't specify Python version when not required (fix current master build failure)

[noirbizarre]

Description

Fixes on #1749 merge.

• remove the python-version: 3.x parameter from setup-uv action when not required (current master build failure)
• remove the uv run prefix in poe tasks

Checklist

• I have read the contributing guidelines

Code Changes

None

Documentation Changes

None

Expected Behavior

GitHub action jobs without a specific Python version runs

Steps to Test This Pull Request

Only on master

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.92%. Comparing base (548621c) to head (c2838c1).
⚠️ Report is 3 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1752   +/-   ##
=======================================
  Coverage   97.92%   97.92%           
=======================================
  Files          60       60           
  Lines        2604     2604           
=======================================
  Hits         2550     2550           
  Misses         54       54           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[bearomorphism]

LGTM