refactor!: remove scenario lists from public API

[gdalle]

Warning

Breaking change for DifferentiationInterfaceTest

Breaking

• Remove scenario lists like default_scenarios or sparse_scenarios from the public API of DIT: now they are only for internal use in testing.

Non breaking

• Improve documentation for Scenario (fixes Better document prep_args in DIT.Scenario #794)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.93%. Comparing base (4f1fc48) to head (fda7988).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #796   +/-   ##
=======================================
  Coverage   97.93%   97.93%           
=======================================
  Files         128      128           
  Lines        7693     7693           
=======================================
  Hits         7534     7534           
  Misses        159      159           

Flag	Coverage Δ
DI	98.81% <ø> (ø)
DIT	95.61% <ø> (ø)

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