test: idempotency of setup logger

[gmuloc]

Description

Great news everyone - it is now MUCH faster to run the tests.. Locally it means 9s vs 74s for my machine.

The issue was that we were adding too many RichHandler when calling CliRunner multiple times...

NOTE: Logging need some more love.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have run pre-commit for code linting and typing (pre-commit run)
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes (tox -e testenv)

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
88.9% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codspeed-hq]

CodSpeed Performance Report

Merging #981 will not alter performance

_{Comparing gmuloc:remove-many-handlers (b17dde6) with main (2a0bf6c)}

Summary

✅ 22 untouched benchmarks