Consider renaming ZetaConnector into ZetaCustody

[lumtis]

Wondering if we shouldn't rename zetaConnector into zetaCustody in protocol contracts.
It's not holding the Zeta in literal sense with the minter/burner model but it's still the contract handling flow of the asset.
It would make it consistent with erc20Custody . You have the gateway contract that executes logics and the custody contracts that handle assets: erc20Custody , zetaCustody , nftCustody , ercxxCustody

[skosito]

@lumtis do we want to rename this?
the only thing i see that would be a bit off is that zeta non eth tokens have updateTssAndConnectorAddresses methods, which would still be using connector terminology