Display the address of the original payload, not the derived GSEPayload

[aminsammara]

The governance proposer contract creates a GSEPayload.sol contract to enforce some checks on the payload. This is all fine and gucci but its confusing to users of the Governance tab on the dashboard to see the address of the GSEPayload when they signalled for the original payload.

The frontend should consider displaying the address of the original payload which can be retrieved from the GSE payload by calling

  function getOriginalPayload() external view override(IProposerPayload) returns (IPayload) {
    return ORIGINAL;
  }