Fix condition error handling

[janfb]

• raise ValueError is a batched condition is passed to ConditionedPotential
• refactor Decision Making example notebook.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.35%. Comparing base (dbcd06b) to head (cbb167b).
Report is 4 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1275       +/-   ##
===========================================
- Coverage   89.25%   78.35%   -10.90%     
===========================================
  Files         119      119               
  Lines        8698     8708       +10     
===========================================
- Hits         7763     6823      -940     
- Misses        935     1885      +950     

Flag	Coverage Δ
unittests	78.35% <100.00%> (-10.90%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
sbi/inference/posteriors/base_posterior.py	85.18% <ø> (-3.06%)	⬇️
sbi/inference/potentials/base_potential.py	91.66% <100.00%> (+0.75%)	⬆️
sbi/utils/conditional_density_utils.py	73.46% <100.00%> (-17.51%)	⬇️

... and 31 files with indirect coverage changes

[michaeldeistler]

Looks great, thanks!