Top flaky test: tst_qmediaplayerbackend::finiteLoops

Test case: tst_qmediaplayerbackend::finiteLoops has failed 9 times and was flaky 14 times last week.

The test has blocked around 9 Gerrit changes past week

Coin log excerpt from failed run:
agent:2024/07/19 12:13:04 build.go:404: 40: QWARN : tst_QMediaPlayerBackend::finiteLoops(No pause, default rate) QGstElement::state detected an asynchronous state change. Return value not reliable
agent:2024/07/19 12:13:04 build.go:404: 40: QWARN : tst_QMediaPlayerBackend::finiteLoops(No pause, default rate) QGstElement::state detected an asynchronous state change. Return value not reliable
agent:2024/07/19 12:13:04 build.go:404: 40: QWARN : tst_QMediaPlayerBackend::finiteLoops(No pause, default rate) QGstElement::state detected an asynchronous state change. Return value not reliable
agent:2024/07/19 12:13:50 build.go:404: 40: FAIL! : tst_QMediaPlayerBackend::finiteLoops(No pause, default rate) Compared values are not the same
agent:2024/07/19 12:13:50 build.go:404: 40: Actual (m_fixture->player.playbackState()): PlayingState
agent:2024/07/19 12:13:50 build.go:404: 40: Expected (QMediaPlayer::StoppedState) : StoppedState
agent:2024/07/19 12:13:50 build.go:404: 40: Loc: [/home/qt/work/qt/qtmultimedia/tests/auto/integration/qmediaplayerbackend/tst_qmediaplayerbackend.cpp(3325)]
agent:2024/07/19 12:13:50 build.go:404: 40: QWARN : tst_QMediaPlayerBackend::finiteLoops(No pause, fast rate) QGstElement::state detected an asynchronous state change. Return value not reliable
agent:2024/07/19 12:13:50 build.go:404: 40: QWARN : tst_QMediaPlayerBackend::finiteLoops(No pause, fast rate) QGstElement::state detected an asynchronous state change. Return value not reliable
agent:2024/07/19 12:13:50 build.go:404: 40: QWARN : tst_QMediaPlayerBackend::finiteLoops(No pause, fast rate) QGstElement::state detected an asynchronous state change. Return value not reliable
agent:2024/07/19 12:13:50 build.go:404: 40: QWARN : tst_QMediaPlayerBackend::finiteLoops(No pause, fast rate) QGstElement::state detected an asynchronous state change. Return value not reliable
agent:2024/07/19 12:13:52 build.go:404: 40: SKIP : tst_QMediaPlayerBackend::finiteLoops(No pause, fast rate) StoppedState is never reached, with pulseaudio. Possibly related to QTBUG-124372
agent:2024/07/19 12:13:52 build.go:404: 40: Loc: [/home/qt/work/qt/qtmultimedia/tests/auto/integration/qmediaplayerbackend/tst_qmediaplayerbackend.cpp(3345)]
agent:2024/07/19 12:13:52 build.go:404: 40: SKIP : tst_QMediaPlayerBackend::finiteLoops(Pause, default rate) Spurious test failures on CI
...

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