bug: patched Environment import trigger errors in apply_body

[Eikix]

Context:

apply_body code has:

system_tx_env = vm.Environment(
            caller=SYSTEM_ADDRESS,
            origin=SYSTEM_ADDRESS,
            block_hashes=block_hashes,
            coinbase=coinbase,
            number=block_number,
            gas_limit=block_gas_limit,
            base_fee_per_gas=base_fee_per_gas,
            gas_price=base_fee_per_gas,
            time=block_time,
            prev_randao=prev_randao,
            state=state,
            chain_id=chain_id,
            traces=[],
            excess_blob_gas=excess_blob_gas,
            blob_versioned_hashes=(),
            transient_storage=TransientStorage(),
        )

But Environment from args_gen does not have traces field.

# All these classes are auto-patched in test imports in cairo/tests/conftests.py
@dataclass
class Environment(
    make_dataclass(
        "Environment",
        [(f.name, f.type, f) for f in fields(EnvironmentBase) if f.name != "traces"],
        namespace={"__doc__": EnvironmentBase.__doc__},
    )
):
    def __eq__(self, other):
        return all(
            getattr(self, field.name) == getattr(other, field.name)
            for field in fields(self)
        )

This triggers an error "Trying to call init on Environment with unknown field traces"

Problem

We patched all imports of Environment to take our redefined class. This applies to inner code of EELS too. This forces us to make sure our modified types have the same fields as EELS classes.

Proposed fix

Stop removing traces field from the modified class and skip it in serialization into cairo altogether