fix: custom attribute filter is now combined with topic filter

[Gigaszi]

Checklist

• I have ensured my branch is mergeable with main (e.g. through git rebase main if necessary)
• My code follows the style guide and was checked with pre-commit before committing
• I have commented my code
• I have added sufficient unit and integration tests
• I have added new Hurl regression tests and checked all existing tests
• I have updated the CHANGELOG.md

[mmerdes]

Thank you for the PR with the fix.

If I am not mistaken the test introduced in this commit:
6a453e2

got removed again accidentally in a later commit.
Please check again.

Maybe this would also be a good opportunity to fix the spelling of 'atribute' in some file names as some of these files were touched in this PR.
What do you think?