Make targets found by pkg_check_modules GLOBAL

[cottsay]

This seems needed for compatibility with older CMake versions (like on Focal).

Explicit packaging run for Python wheels: https://github.com/osrf/createrepo-agent/actions/runs/22783532500

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 48.90%. Comparing base (b6436e9) to head (75a73f6).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #34   +/-   ##
=======================================
  Coverage   48.90%   48.90%           
=======================================
  Files          20       20           
  Lines        2638     2638           
  Branches      538      538           
=======================================
  Hits         1290     1290           
  Misses       1040     1040           
  Partials      308      308           

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