ci: skip tests during publishing of release

[jaychia]

Tests were failing for unknown reasons: https://github.com/Eventual-Inc/Daft/actions/runs/13064922153/job/36455524516

We skip tests now when publishing, and should just use main as the source of truth

[codspeed-hq]

CodSpeed Performance Report

Merging #3744 will degrade performances by 34.37%

_{Comparing jay/fix-package-build (37d4c66) with main (3462732)}

Summary

⚡ 1 improvements
❌ 1 regressions
✅ 25 untouched benchmarks

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

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
⚡	test_iter_rows_first_row[100 Small Files]	225.7 ms	176.1 ms	+28.15%
❌	test_show[100 Small Files]	15.8 ms	24 ms	-34.37%

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.65%. Comparing base (3462732) to head (37d4c66).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3744   +/-   ##
=======================================
  Coverage   77.65%   77.65%           
=======================================
  Files         731      731           
  Lines       92379    92379           
=======================================
  Hits        71734    71734           
  Misses      20645    20645