Top flaky test: tst_qeventloop::processEvents on QNX_710 X86_64.

Test case: tst_qeventloop::processEvents has failed on QNX_710 X86_64 QCC
The test failed 3 times and was flaky 37 times last week.

Coin log excerpt from failed run:
agent:2023/12/01 23:53:47 build.go:404: 22: FAIL! : tst_QEventLoop::processEvents(core) 'eventLoop.processEvents(QEventLoop::WaitForMoreEvents)' returned FALSE. ()
agent:2023/12/01 23:53:47 build.go:404: 22: Loc: [/home/qt/work/qt/qtbase/tests/auto/corelib/kernel/qeventloop/tst_qeventloop.cpp(209)]
agent:2023/12/01 23:53:48 build.go:404: 22: QWARN : tst_QEventLoop::exec() QEventLoop::exec: instance 0x1342027e60 has already called exec()
...

Full log at : coin log
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