zkevm@v0.3.0

This is a new release of projects/zkevm based on bal@v5.4.0 (i.e. the latest tag of bal-devnet-3).

On the specs side, changes:

• Any bytecode successfully created during block execution is considered available for further transactions requiring the same code_hash. For more details, see the corresponding PR.

On the test front, 117 new tests were created to provide much better coverage for bytecodes and headers fields border cases in the execution witness:

• Bytecodes: 104 new tests in files test_witness_bytecodes_*.py and test_witness_7702.py
• Headers: 13 new tests in file test_witness_headers.py.

To ease testing for EL clients, future releases will always be based on the latest release of the bal-devnet-x active devnet. Minor versions will be bumped whenever a new devnet is released.