Merge branch 'selftests-net-mixed-select-polling-mode-for-tcp-ao-tests'

Dmitry Safonov via says:

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selftests/net: Mixed select()+polling mode for TCP-AO tests

Should fix flaky tcp-ao/connect-deny-ipv6 test.

v1: https://lore.kernel.org/20250312-tcp-ao-selftests-polling-v1-0-72a642b855d5@gmail.com
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Link: https://patch.msgid.link/20250319-tcp-ao-selftests-polling-v2-0-da48040153d1@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>