We aren't supporting eigenvectors for now because eigenvectors are not
uniquely determined by the input matrix, they're only determined up to
'gauge' (that is multiplication by a complex scalar with absolute value
1). Note, this means that second derivatives aren't supported, because
they involve differentiating the eigvals jvp, which itself depends on
eigenvectors.
Because we now have a facade around the lax library, we can expose the lax_linalg primitives directly in lax without creating circular dependency problems.
Leave a few forwarding stubs to be removed later.
PiperOrigin-RevId: 340658800