Revert handling of AutoEnzyme(; constant_function)

[gdalle]

Warning

This is a temporary reversion, until @wsmoses can throw an Enzyme error when closures are insufficiently Duplicated. Then we will probably yank a few ADTypes releases and change the default to AutoEnzyme(constant_function=nothing). The goal right now is to make a new release of DI without breaking any code.

DI extensions

• Enzyme: Comment out the more complicated get_f_and_df from Handle closures with Enzyme #375 and Better handling of AutoEnzyme(constant_function=false) #382. All functions are considered constant regardless of the constant_function=true argument to AutoEnzyme

DI tests and docs

• Remove constant_function=true everywhere

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.68%. Comparing base (a65f228) to head (e32a4ad).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #394      +/-   ##
==========================================
+ Coverage   96.63%   96.68%   +0.05%     
==========================================
  Files         103      103              
  Lines        4996     4981      -15     
==========================================
- Hits         4828     4816      -12     
+ Misses        168      165       -3     

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