Merge branch 'net-sched-netem-enhancements'

Stephen Hemminger says:

====================
net/sched: netem: enhancements

This is a collection of improvements to netem found while
investigating the fixes now in net tree.

v5 - minor cleanups
   - add allocation_errors counter
   - align counters with where impairment occurs
====================

Link: https://patch.msgid.link/20260509171123.307549-1-stephen@networkplumber.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>