Top flaky test: tst_qtcpserver::qtbug6305

Test case: tst_qtcpserver::qtbug6305 has failed 3 times and was flaky 3 times last week.

The test has blocked around 3 Gerrit changes past week

Coin log excerpt from failed run:
agent:2024/07/26 07:38:41 build.go:404: 439: FAIL! : tst_QTcpServer::qtbug6305(WithoutProxy:fe80::1004:cd44:71f7:d764%en0) 'server.listen(listenAddress)' returned FALSE. (The address is not available)
agent:2024/07/26 07:38:41 build.go:404: 439: Loc: [/Users/qt/work/qt/qtbase/tests/auto/network/socket/qtcpserver/tst_qtcpserver.cpp(911)]
...

Full log at : coin log
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Information about the Qt test system: qt test execution information