add calls to `conda list` in Github Action test workflows to inspect environment

[valeriupredoi]

Description

Closes #2390

Since that issue with mamba, it's best to have our own env inspectors in, and the reason they are called after pip install is that we should be able to catch any package installed from PyPI (whether we want it to be or not).

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 94.29%. Comparing base (7b08b3b) to head (e379d89).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2391 +/- ## ======================================= Coverage 94.29% 94.29% ======================================= Files 246 246 Lines 13532 13532 ======================================= Hits 12760 12760 Misses 772 772 ```

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[valeriupredoi]

thanky much, Manu :beer: