feat: EVM simulator as optional for the server

[IAvecilla]

What ❔

List of changes:

• Added the flag use_evm_simulator and make it configurable from a .toml file.
• For the list GAS_TEST_SYSTEM_CONTRACTS we check if the evm simulator is on and used the default account bytecode hash and bytecode if it's not.
• For the BaseSystemContracts struct, we check if the evm simulator is on and used the default account bytecode hash and bytecode if it's not.
• We made the evm_deploy_tracer optional in the default tracers and use it if the evm simulator is enabled.
• The EVM_SIMULATOR_HASH constant now checks if the evm simulator is on and used the default account bytecode hash and bytecode if it's not.
• The SYSTEM_CONTRACTS vec now checks if evm simulator is and reads the bytecode of the EVM_GAS_MANAGER but skips it if it's off, same for the get_system_smart_contracts_from_dir function.
• Checks if the evm simulator is enabled and add the correct token for the multicall3 in the get_multicall_data function.
• Make the get_evm_simulator_bytecode_hash optional in the ZkSyncFunctions struct and use it if the evm simulator is enabled.

Why ❔

We need to be able to run zksync-era without the evm simulator contract and keep everything working.

Checklist

• PR title corresponds to the body of PR (we generate changelog entries from PRs).
• Tests for the changes have been added / updated.
• Documentation comments have been added / updated.
• Code has been formatted via zk fmt and zk lint.