Function deploy_fee_contract_proxy 

pub async fn deploy_fee_contract_proxy(
    provider: impl Provider,
    contracts: &mut Contracts,
    admin: Address,
) -> Result<Address>

The primary logic for deploying and initializing an upgradable fee contract.

Deploy the upgradable proxy contract, point to a deployed fee contract as its implementation, and invoke initialize() on it.

• admin: is the new owner (e.g. a multisig address) of the proxy contract

Return the proxy address.