* Handled transpose of `dot_general` correctly with shardings
* Handled transpose of `reduce_sum` correctly with shardings
* `ShapedArray.to_tangent_aval` now sets the sharding of the tangent (not handling unreduced yet).
* `ConcreteArray.aval` correctly sets the sharding which is extracted from the `val` attribute.
* (Paired with Dougal!) Added sharding rule for `reshape_p` only when singleton dims are added/removed.
* Added sharding rule for `select_n_p` because it gets called during `jax.grad` of minformer.
* Added `sharding` attribute to `broadcast_in_dim` because we need to provide the correct sharding to it during `full` and transpose of `reduce_sum`.
PiperOrigin-RevId: 689837320
34611be53d