Merge branch 'selftests-tc-testing-more-updates-to-tdc'

Pedro Tammela says:

====================
selftests: tc-testing: more updates to tdc

Address the issues making tdc timeout on downstream CIs like lkp and
tuxsuite.
====================

Link: https://lore.kernel.org/r/20231117171208.2066136-1-pctammela@mojatatu.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>