[Improvement] Return an array of addresses within SingletonDeploymentV2

[schmanu]

What is this request about?

The new networkAddresses Record within the SingletonDeploymentV2 type contains either a string or string[].
This makes handling it sub-optimal as both cases either need to be handled in separate branches or a helper function that converts string | string[] into string[] is required.

The proposition is to change the type to:

export interface SingletonDeploymentV2 {
  released: boolean;
  contractName: string;
  version: string;
  deployments: AtLeastOne<Record<AddressType, { address: string; codeHash: string }>>;
  /* eslint-disable-next-line @typescript-eslint/no-explicit-any */
  abi: any[];
  networkAddresses: Record<string, string[]>;
}

Example usage

There are already some usage examples out there which currently all wrote such functions / have not nicely readable code to check deployments.

Helper functions:

https://github.com/safe-global/safe-wallet-web/blob/epic/multichain-safes/src/services/contracts/deployments.ts#L18

https://github.com/safe-global/safe-client-gateway/blob/multiple-official-deployments/src/domain/common/utils/deployments.ts#L89

Case handling:

https://github.com/safe-global/safe-core-sdk/blob/feat/predict-safe-address-custom-contracts/packages/protocol-kit/src/contracts/config.ts#L171