Fix ledgerId when forking from Local Node

[acuarica]

The ledgerId does not return the proper value when forking from a local node network. This applies to both Foundry library and Hardhat plugin.

For the Foundry library, the solution is simpler because the chainId is already available. We just need to include another case for local node in HtsSystemContractJson::_getLedgerId.

On the other hand, for the Hardhat plugin, the core function getHtsStorageAt does not have JSON-RPC access. We could however extend the IMirrorNodeClient to support retrieving the chainId of the remote network.