Remove `onRevert` from `UniversalContract` interface

[lumtis]

Current UniversalContract contains

interface UniversalContract {
    function onCrossChainCall(
        zContext calldata context,
        address zrc20,
        uint256 amount,
        bytes calldata message
    )
        external;

    function onRevert(RevertContext calldata revertContext) external;
}

onRevert should not be a requirement to develop universal apps, therefore the onRevert method should be removed from the interface, the developer should use the Revertable interface.