This has the downside of keeping around the UnloadedMeshComputation,
but it makes the serialize() API easier to understand.
PiperOrigin-RevId: 518715469
This adds experimental APIs to `serialize_executable.py`:
`compile_and_serialize(lowered)`
and
`load_compiled(serialized, in_tree, out_tree)`
for serializing and deserializing executables.
PiperOrigin-RevId: 489014705