Allow to have chain with non-Integer chain IDs

[lumtis]

Describe the Issue We currently use a int64 type for chain ID that identifies a chain.

Some chain might not use an integer as the format for the chain ID. For example: Cosmos chain uses strings: cosmoshub-4 injective-1

We should support static data for these chains.

Since changing the chain ID format would be a significant refactoring since we index many data using it. I think we could consider a virtual chain ID. A int64 id that identifies the chain ID on ZetaChain. Then a mapping object can be use to retrieve the actual chain ID.

It can follow a specific rule like 7010 + index of the chain using virtual chain ID

Example:

var CosmosHubChainID "cosmoshub-4"
var CosmosHubVirtualChainID 7010

CosmosHub {
  ChainID: CosmosHubVirtualChainID
 ...
}

GetCosmosChainID(CosmosHubVirtualChainID) -> CosmosHubChainID

It seems to be the same with Solana. Doesn't seem to have a proper chain ID