Add code coverage ignore file

[AzulRadio]

Signed-off-by: youhy [email protected]

New feature

Part of gz-sim#1575

Summary

Allow users to add coverage.ignore.in each repo to ignore files for the code coverage report. See gazebosim/gz-cmake#279 for details.

Ignore the cli/include/vendored-cli/ignition/utils/cli/ folder.

Need to wait for a forward-porting for gazebosim/gz-cmake#279 from citadel to fortress to be merged.

Test it

Checklist

• Signed all commits for DCO
• Added tests
• Added example and/or tutorial
• 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.