swift

4ffc7141 - [AutoDiff] Use `GenericSignature` instead of `GenericSignatureImpl *`. (#27831)

[AutoDiff] Use `GenericSignature` instead of `GenericSignatureImpl *`. (#27831) Use `GenericSignature` instead of `GenericSignatureImpl *` in `AutoDiffConfig` and the differentiation transform. `AutoDiffConfig` changes by @marcrasi.