Add the ability for Cadence-native projects to update their EVM symbol

[sisyphusSmiling]

Description

Given that Cadence NFTs do not have a standard view defining their symbol and ERC721 contracts require a symbol, the bridge currently derives one when the asset is onboarded. Since onboarding is permissionless, project owners may wish to update their project's bridged ERC721 symbol. There should be a path to ensure projects can do so if they wish by making changes to their Cadence contract and syncing the defined cadence symbol with the corresponding ERC721 symbol.