Fix codecov coverage reports

[anissa111]

PR Summary

Closes #444

Summary of changes:

• Fixes codecov coverage by using an editable install of geocat-comp
• Removed redundant namespace and coverage tests, combining them into one test run that outputs a coverage report
• Adds artifacts for test outputs

See fixed coverage report on my fork.

PR Checklist

General

• Make an issue if one doesn't already exist
• Link the issue this PR resolves by adding closes #XXX to the PR description where XXX is the number of the issue.
• Add a brief summary of changes to docs/release-notes.rst
• Add appropriate labels to this PR
• Make your changes in a forked repository rather than directly in this repo
• Passes precommit. To set up on your local, run pre-commit install from the top level of the repository. To manually run pre-commits, use pre-commit run --all-files and re-add any changed files before committing again and pushing.