LEVM: CREATE type transactions not checking if address exists

[LeanSerra]

When sending a transaction of type TxKind::CREATE, the code is not checking if the address exists.
Steps to Reproduce

• Run TransactionCollisionToEmptyButCode.json test
  • This test should fail LEVM continues with the creation but REVM halts with CreateCollision error

Possible fix

• Check against the db if the address already exists.
  • This check could be added after this line:
    

    ethrex/crates/vm/levm/src/vm.rs

    Lines 203 to 208 in 8ac2835

    	let new_contract_address =
    	VM::calculate_create_address(env.origin, db.get_account_info(env.origin).nonce)
    	.map_err(|_| {
    	VMError::Internal(InternalError::CouldNotComputeCreateAddress)
    	})?;