Cancun upgrade (#911)

* Update `eth-types` for cancun

* Add `sepolia` network config

* Update `BlockHeader` fields

* Add deneb config for sepolia and goerli

* Fix `compute_fork_version`

* Use workspace version

* Update & cleanup dependencies

* Update eth2near relayer deps

* Update contracts builds

* Fix migration test

* Update contracts builds

* Fix migration test

* Fix block json namings

* Fix `validate_beacon_block_header_update`

* fix proof size for deneb

* update bin

* Cleanup `ExecutionBlockProof`

* fix sync with eth after init test

* Update fork epoch

* Update contract build

* Fix configs for `sepolia`

* Update contract build:

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Co-authored-by: Olga Kunyavskaya <olga.kunyavskaya@aurora.dev>