Auto merge of #153379 - TKanX:refactor/149164-simplify-autodiff-rlib, r=ZuseZ4

refactor(autodiff): Simplify Autodiff Handling of `rlib` Dependencies

### Summary:

Resolves the two FIXMEs left in rust-lang/rust#149033, per @bjorn3 guidance in [the discussion](rust-lang/rust#149033 (comment)).

Closes rust-lang/rust#149164 

r? @ZuseZ4
cc @bjorn3

Author: bors