Ignore DeviceCommissioner::OnDeviceConnectionFailureFn if it's for the wrong node

[bzbarsky-apple]

Problem

DeviceCommissioner::OnDeviceConnectedFn is ignored if it's not for mDeviceBeingCommissioned. We should do the same with DeviceCommissioner::OnDeviceConnectionFailureFn, because otherwise we might end up calling into CommissioningStageComplete without a valid mDeviceBeingCommissioned and crash with a stack like:

0   chip::Controller::DeviceCommissioner::CommissioningStageComplete(chip::ChipError, chip::Controller::CommissioningDelegate::CommissioningReport) + 88 (src/controller/CHIPDeviceController.cpp:1589)
1   chip::Controller::DeviceCommissioner::OnDeviceConnectionFailureFn(void*, chip::ScopedNodeId const&, chip::ChipError) + 372 (src/controller/CHIPDeviceController.cpp:1665)
2   chip::Controller::DeviceCommissioner::OnDeviceConnectionFailureFn(void*, chip::ScopedNodeId const&, chip::ChipError) + 372 (src/controller/CHIPDeviceController.cpp:1665)
3   chip::OperationalSessionSetup::DequeueConnectionCallbacks(chip::ChipError) + 408 (src/app/OperationalSessionSetup.cpp:283)
4   chip::OperationalSessionSetup::OnSessionEstablishmentError(chip::ChipError) + 144 (src/app/OperationalSessionSetup.cpp:315)
5   chip::CASESession::AbortPendingEstablish(chip::ChipError) + 108 (src/protocols/secure_channel/CASESession.cpp:297)
6   chip::CASESession::OnResponseTimeout(chip::Messaging::ExchangeContext*) + 236 (src/protocols/secure_channel/CASESession.cpp:290)
7   chip::Messaging::ExchangeContext::NotifyResponseTimeout(bool) + 284 (src/messaging/ExchangeContext.cpp:481)

(on SHA 2e10854 for purposes of line numbers). This is one of the top crashes we are observing in our Matter testing.

which is crashing on the mDeviceBeingCommissioned dereference in DeviceCommissioner::CommissioningStageComplete

Proposed Solution

Add the relevant checks.