Top flaky test: tst_qdnslookup::lookup on Windows_11_22H2 X86_64, Unbutu 22_04, and other plaforms

Test case: tst_qdnslookup::lookup has failed on Windows_11_22H2 X86_64 Mingw
The test failed 2 times and was flaky 2 times last week.

Coin log excerpt from failed run:
agent:2024/03/15 11:50:51 build.go:404: 437: FAIL! : tst_QDnsLookup::lookup(any-a-plus-aaaa) Compared values are not the same
agent:2024/03/15 11:50:51 build.go:404: 437: Actual (addresses.join(';')): "198.51.100.1"
agent:2024/03/15 11:50:51 build.go:404: 437: Expected (host) : "198.51.100.1;2001:db8::1:1"
agent:2024/03/15 11:50:51 build.go:404: 437: C:/Users/qt/work/qt/qtbase/tests/auto/network/kernel/qdnslookup/tst_qdnslookup.cpp(393) : failure location
...

Full log at : coin log
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