Context

The EthereumTransactionCommon type required the field to, even though it's optional, in the case of a contract deployement.

It doesn't anymore.

The MR also updates the proxynode to reflect that. No more 0x00..00 addresses in the receipts !

Manually testing the MR

make -f kernels.mk
dune exec tezt/tests/main.exe --  --file evm_rollup.ml

Document the interface of any function added or modified (see the coding guidelines)
Document any change to the user interface, including configuration parameters (see node configuration)
Provide automatic testing (see the testing guide).
For new features and bug fixes, add an item in the appropriate changelog (docs/protocols/alpha.rst for the protocol and the environment, CHANGES.rst at the root of the repository for everything else).
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