[JAX] Update users of deprecated jax.lax.* submodule exports.
[JAX] Update users of deprecated jax.lax.* submodule exports.

jax.lax.lax/lax_parallel/lax_control_flow were internal names that will no longer be exported. Update users to use either jax.lax.* public names, or to explicitly use the new internal names (jax._src.lax.*).

PiperOrigin-RevId: 338267976

google-research/google-research,google-research/google-research,google-research/google-research,google-research/google-research,google-research/google-research,google-research/google-research,google-research/google-research,google-research/google-research,google-research/google-research,google-research/google-research,google-research/google-research