Rollup merge of #142640 - Sa4dUs:ad-intrinsic, r=ZuseZ4

Implement autodiff using intrinsics

This PR aims to move autodiff logic to `autodiff` intrinsic. Allowing us to delete a great part of our frontend code and overall, simplify the compilation pipeline of autodiff functions.

Author: Zalathar

src/SUMMARY.md

@@ -107,7 +107,6 @@
     - [Installation](./autodiff/installation.md)
     - [How to debug](./autodiff/debugging.md)
     - [Autodiff flags](./autodiff/flags.md)
-    - [Current limitations](./autodiff/limitations.md)
 
 # Source Code Representation