Improve the number of web3 calls the sdk makes

[r-marques]

The goal is to try to reduce the number of calls the sdk makes to the web3rpc endpoints. I think that some of them can be reduced by simply caching the values on the sdk during instantiation

• eth_getTransactionByHash: I think this is coming from the nvm one backend that needs to fetch the transaction receipts for the events. should be fixed when we improve the subgraphs
• eth_getBlockByNumber: Same as above
• eth_chainId: This method is used in multiple places in the sdk. I think this value is being queried every time we need it. If that is the case it would be enough to just add this value as a property of sdk.keeper during initialization and then just use that value
• eth_accounts: Not sure why this method is called. We don't use accounts stored in the node. infura always returns an empty array. I think this is called when doing sdk.accounts.list() which we use a lot. In any case the accounts list should be populated at sdk instantiation time and the values re-used after that

[r-marques]

• eth_accounts was fixed in Feat/ethers v6 #556
• eth_chainId was fixed in feat: reduce number of calls to chainId #560
• eth_getTransactionByHash and eth_getBlockByNumber should have been resolved when this information was added to subgraph events

Other improvements that may help further reduce web3calls when listening to events on chain is #559