add blockParameter support

[bitrocks]

According to eth.wiki rpc, the following methods have an extra default block parameter:

1. eth_getBalance
2. eth_getCode
3. eth_getTransactionCount
4. eth_getStorageAt
5. eth_call

Current Impl ignored block parameter, as the state snapshot was not supported until this pr.

To support block parameter:

1. the web3 rpc layer need handle block parameter;
2. godwoken rpc need handle block parameter;
   • get_balance
   • get_storage_at
   • get_nonce
   • get_data
   • execute_raw_l2transaction