QTimer: Timers below 2 seconds aren't Precise

Resulted from https://lists.qt-project.org/pipermail/development/2023-May/043971.html thread.

The https://codereview.qt-project.org/c/qt-creator/qt-creator/+/480663 test fails on some machines.

Having 2 single shot timers scheduled in a row from one thread. The 1st one with 1ms timeout, and the 2nd one with 2ms timeout. The second one is scheduled after the first one. It may happen, that the 2nd timer's timeout comes first, before the 1st timer's timeout.