Fix quantiles to be compliant with 2.0.0 and accept list inputs

[m-mohr]

Fix quantiles to be compliant with 2.0.0 and accept list inputs.

Found by the new test suite and want to make you aware. I won't have time to add tests, this is more a bug report rather than a full PR.

[codecov]

Codecov Report

Attention: Patch coverage is 40.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 79.29%. Comparing base (8d9e3fb) to head (44dd404).
Report is 51 commits behind head on main.

Files with missing lines	Patch %	Lines
...neo_processes_dask/process_implementations/math.py	40.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #204      +/-   ##
==========================================
- Coverage   79.42%   79.29%   -0.14%     
==========================================
  Files          30       30              
  Lines        1468     1473       +5     
==========================================
+ Hits         1166     1168       +2     
- Misses        302      305       +3     

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[ValentinaHutter]

I just realized that I now did this in a separate PR rather than in your draft. I will close this one, as it is done now.