Merge branch 'selftests-net-add-missing-kconfig-and-settings'

Matthieu Baerts says:

====================
selftests: net: add missing kconfig and settings

When trying to execute the same selftests targets as the ones executed
on NIPA, but using containers with minimal tools, I got some issues
with a few tests.

Most of these issues are due to missing kernel config, but also too
short timeout:

- For the kconfig, these issues were not visible on NIPA, because some
  targets are executed in the same runner, using the same kernel: the
  config files of the different targets are merged. On my side, I
  followed the recommended way, and only used the config file on top of
  a 'make defconfig', revealing some missing kconfig's.

- For the timeout, that was not visible on NIPA either because the
  Netdev machines are very powerful and the timeout is doubled when
  using a debug kernel config (ovpn case), or because there are some
  custom values on the test branches only (drv-net).

While at it, add an extra patch to display an error message in case of
failure with some netconsole scripts.
====================

Link: https://patch.msgid.link/20260710-net-sft-fix-containers-v1-0-a2915c294ef5@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>