Define GZ_LAUNCH_VERSION_NAMESPACE in config.hh

[scpeters]

🦟 Bug fix

Part of gazebosim/gz-cmake#412.

Summary

Ensure that the GZ_LAUNCH_VERSION_NAMESPACE macro is defined in config.hh.in.

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

[scpeters]

there are problems with CI

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ab9b84d) 58.62% compared to head (28b4f0c) 58.62%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #247   +/-   ##
=======================================
  Coverage   58.62%   58.62%           
=======================================
  Files           3        3           
  Lines         423      423           
=======================================
  Hits          248      248           
  Misses        175      175           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[scpeters]

there are problems with CI

fixed by 28b4f0c