This PR fixes the neuron runtime with the following:
Proxy the PJRT Api method to enforce the client struct sizes since the
neuron PJRT plugin doesn't use `>=` but `==` to assert them, breaking
PJRT compatibility guarantees.
Fixes https://github.com/aws-neuron/aws-neuron-sdk/issues/1095
Reimplement `libneuronxla` in Zig to control neuronx-cc sandboxing and
invocation.
Implement a python bootstrapper in Zig to create a full blown
`neuronx-cc` executable, avoiding the infamous chicken and egg problem
of python executables boostrapping when sandboxed (due to fixed path
shebangs).
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Co-authored-by: Corentin Kerisit <corentin.kerisit@gmail.com>
