Prior to this change the behavior in eager and under jax.jit was inconsistent
>>> (lambda *args: jax.debug.callback(print, *args))([42])
[42]
>>> jax.jit(lambda *args: jax.debug.callback(print, *args))([42])
[array(42, dtype=int32)]
It was also inconsistent with other callback APIs, which cast the arguments
to jax.Arrays.
Closes#20627.
PiperOrigin-RevId: 626461904
6e23c14f85