build: improve package error conflict parsing

[efahl]

Improve apk conflicts message parsing to handle case where conflicting file ownership is detected.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.61%. Comparing base (5e65dec) to head (8a1ea06).
⚠️ Report is 365 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1592       +/-   ##
===========================================
+ Coverage   80.75%   91.61%   +10.85%     
===========================================
  Files          15       16        +1     
  Lines         977     1741      +764     
===========================================
+ Hits          789     1595      +806     
+ Misses        188      146       -42     

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