swift

3417a08c - [TF] TF-496: Conditionally conform SIMD types to Differentiable (#24786)

[TF] TF-496: Conditionally conform SIMD types to Differentiable (#24786) - Add protocol and struct gyb file conformances to make SIMD Differentiable - Add tests TODO: - Figure out how to add back the default protocol implementation of `-=`/`+=` due to `AdditiveArithmetic` default implementation - Had to remove `@_alwaysEmitIntoClient` from `sum()` due to bug (filed as TF-545) - Remove some of the redundant custom VJPs which are blocked by a bug (filed as TF-547)