ci: Disable mamba-content-trust and auth tests

[jjerphan]

Description

As proposed by @JohanMabille.

Type of Change

• Bugfix
• Feature / enhancement
• CI / Documentation
• Maintenance

Checklist

• My code follows the general style and conventions of the codebase, ensuring consistency
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have run pre-commit run --all locally in the source folder and confirmed that there are no linter errors.
• I have added tests that prove my fix is effective or that my feature works
• New and existing tests pass locally with my changes

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 52.29%. Comparing base (1940761) to head (6c26c2b).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4186      +/-   ##
==========================================
- Coverage   52.30%   52.29%   -0.01%     
==========================================
  Files         239      239              
  Lines       29088    29088              
  Branches     3082     3082              
==========================================
- Hits        15215    15213       -2     
- Misses      13870    13872       +2     
  Partials        3        3              

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