ci: also build armv7l version of KopiaUI

[jkowalski]

Also fixed embedded server paths for KopiaUI.

Fixes #1448

[codecov]

Codecov Report

Merging #1483 (e163cf7) into master (81f66cb) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1483      +/-   ##
==========================================
+ Coverage   68.52%   68.53%   +0.01%     
==========================================
  Files         367      367              
  Lines       29006    29006              
==========================================
+ Hits        19875    19878       +3     
+ Misses       7483     7481       -2     
+ Partials     1648     1647       -1     

Impacted Files	Coverage Δ
repo/content/content_manager_iterate.go	89.50% <0.00%> (-2.21%)	⬇️
internal/epoch/epoch_manager.go	84.71% <0.00%> (-0.57%)	⬇️
repo/content/merged.go	88.88% <0.00%> (+2.77%)	⬆️
cli/command_content_verify.go	78.94% <0.00%> (+5.26%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 81f66cb...e163cf7. Read the comment docs.