Adds callback support to the abort function

[0xJem]

• Call the onCancel callback during abort()
• Bury any errors from the callback

[Oighty]

I think this works, but there is another option which I think are simpler here. It relies on two facts:

1. We are already doing an external call, but it's hidden by the Callbacks library. We can ignore the library and just call it directly on the callback.
2. We can use a low-level call and ignore the returned (bool success, bytes memory returnData) variables.

// onCancel callback invocation without revert

// Assemble the calldata
bytes memory cd = abi.encodeWithSelector(
    ICallback.onCancel.selector,
    lotId_,
    refund_,
    lotRouting[lotId_].callbacks.hasPermission(Callbacks.SEND_BASE_TOKENS_FLAG),
    callbackData_
);

// Call the onCancel callback and ignore the return variables
address(lotRouting[lotId_].callbacks).call(cd);

Originally, I was thinking we might have to specify a gas limit to prevent transactions that exceed the block gas limit, but you can set a manual limit on the transaction. The auction house will retain 1 / 64 of the gas remaining when the call is made, so there will always be some left, even if the callback reverts due to OOG. Since this is the last thing called in the abort function, I think we're ok.

[0xJem]

Fixed!

[etherSky111]

All good.