Add EIP-1898 support needed for The Graph compatibility

Fixes: #10814

This PR updates the following RPC methods according to EIP-1898
specs.

The following RPC methods are affected:

- eth_getBalance
- eth_getStorageAt
- eth_getTransactionCount
- eth_getCode
- eth_call

Note that eth_getBlockByNumber was not included in this list in
the spec although it seems it should be affected also?

Currently these methods all accept a blkParam string which can be
one of "latest", "earliest", "pending", or a block number (decimal
or hex). The spec enables caller to additionally specify a json
hash which can include the following fields:

- blockNumber EthUint64: A block number (decimal or hex) which is
  similar to the original use of the blkParam string
- blockHash EthHash: The block hash
- requireCanonical bool) If true we should make sure the block is
  in the canonical chain

Since the blkParam needs to support both being a number/string and
a json hash then this to properly work we need to introduce a new
struct with pointer fields to check if they exist. This is done
in the EthBlockParamByNumberOrHash struct which first tries to
unmarshal as a json hash (according to eip-1898) and then fallback
to unmarshal as string/number.

cli/evm.go

@@ -130,7 +130,7 @@ var EvmCallSimulateCmd = &cli.Command{
 			From: &fromEthAddr,
 			To:   &toEthAddr,
 			Data: params,
-		}, "")
+		}, ethtypes.NewEthBlockParamFromPredefined("latest"))
 		if err != nil {
 			fmt.Println("Eth call fails, return val: ", res)
 			return err
@@ -518,7 +518,7 @@ var EvmGetBytecode = &cli.Command{
 		defer closer()
 		ctx := ReqContext(cctx)
 
-		code, err := api.EthGetCode(ctx, contractAddr, "latest")
+		code, err := api.EthGetCode(ctx, contractAddr, ethtypes.NewEthBlockParamFromPredefined("latest"))
 		if err != nil {
 			return err
 		}