Automatic merge from submit-queue
kubenet: fix up CNI bridge TX queue length if needed
CNI's bridge plugin mis-handles the TxQLen when creating the bridge,
leading to a zero-length TX queue. This doesn't typically cause
problems (since virtual interfaces don't have hard queue limits)
but when adding traffic shaping, some qdiscs pull their packet
limits from the TX queue length, leading to a packet limit of 0
in some cases. Until we can depend on a new enough version of
CNI, fix up the TX queue length internally.
Closes: https://github.com/kubernetes/kubernetes/issues/25092
32256d53aa