Revert "Fix lcov on Ubuntu Noble (#436)"

[scpeters]

🦟 Bug fix

This reverts commit 930e17fa831daefff6f8905bc864e63fd028a20a (from #436) since it breaks GitHub workflows using Jammy for code coverage (there are still many Ionic packages using Jammy for codecov).

Summary

Revert to unbreak workflows until we can fix things better (see https://github.com/gazebosim/gz-utils/pull/133 for an example failure).

Checklist

• [X] 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.