checkWatchListConsistencyIfRequested performs a data consistency check only when
the KUBE_WATCHLIST_INCONSISTENCY_DETECTOR environment variable was set during a binary startup.
The consistency check is meant to be enforced only in the CI, not in production.
The check ensures that data retrieved by the watch-list api call
is exactly the same as data received by the standard list api call.
Note that this function will panic when data inconsistency is detected.
This is intentional because we want to catch it in the CI.
Kubernetes-commit: b31e7793d0d873a71c90caf8455556aa905cf88d
originally we honored only apierrors.IsInvalid
but decided to fallback on every error
because it is better to make progress than deadlocking
Kubernetes-commit: 4b3915017950a114124a88c5d308bd8bfb9ec48e
