Add ETROG check to MaxL2BlockGasLimit

[tclemos]

The code below checks if the returned gasLimit by the Executor is greater than the MaxL2BlockGasLimit and apply the limit to allow applications to be compatible with the node.

We must add the check for the ForkID and make sure this is applied only for ETROG or before.

        gasLimit := l2Block.GasLimit
	if gasLimit > MaxL2BlockGasLimit {
		gasLimit = MaxL2BlockGasLimit
	}