message: feat(sdk-core): change third party to backupGpgKey
  Changes the `createBitgoKeychain()` function to use the distinct backup
  GPG keys that are generated, whether it is a third party backup or not.
diff: @@ -322,9 +322,7 @@ export class EcdsaUtils extends baseTSSUtils<KeyShare> {
  },
  ],
  userGPGPublicKey: userGpgKey.publicKey,
  - // BitGo is the only supported third party backup as of now, so the
  - // backup GPG key is the same as bitgo GPG key. Else use the provided backupGpgKey.
  - backupGPGPublicKey: isThirdPartyBackup ? bitgoPublicGpgKey.armor() : backupGpgKey.publicKey,
  + backupGPGPublicKey: backupGpgKey.publicKey,
  enterprise: enterprise,
  algoUsed: 'ecdsa',
  };
  