alpine: use root to avoid nosuid issue in ci

[trws]

problem: just like with el9 and noble, alpine requires user to be set to root in the dockerfile here to build right under qemu-user-static in CI

solution: add the user root line where required

Another mistake that only shows up once we get into master, and this one only sometimes. 🤦

[jameshcorbett]

👍

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.4%. Comparing base (37215cf) to head (20d1f60).
Report is 80 commits behind head on master.

Additional details and impacted files

@@          Coverage Diff           @@
##           master   #1280   +/-   ##
======================================
  Coverage    75.4%   75.4%           
======================================
  Files         111     111           
  Lines       15359   15359           
======================================
  Hits        11588   11588           
  Misses       3771    3771           

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