Fixed failing tests in `main`

[jaimergp]

Description

• Closes https://github.com/conda/conda-libmamba-solver/issues/455
• Needs https://github.com/conda/conda/pull/14030

It was already fixed in https://github.com/conda/conda-libmamba-solver/issues/457, but putting here too for the 24.7 release.

Checklist - did you ...

• [ ] Add a file to the news directory (using the template) for the next release's release notes?
• [X] Add / update necessary tests?
• [ ] Add / update outdated documentation?