Merge branch 'selftests-rds-ksft-cleanups'

Allison Henderson says:

====================
selftests: rds: ksft cleanups

This set addresses a few rds selftests clean ups and bugs encountered
when running in the ksft framework.  The first patch is a clean up
patch that addresses pylint warnings, but otherwise no functional
changes.  The next patch moves the test time out to a ksft settings
file so that the time out is set appropriately.  And lastly we fix a
tcpdump segfault caused by deprecated a os.fork() call.
====================

Link: https://patch.msgid.link/20260308055835.1338257-1-achender@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>