Call timeBeginPeriod only once on startup (#6273)

Use SetProcessInformation to make the OS better handle our threads on big/small cores

src/qt/qt_ui.cpp

@@ -65,11 +65,7 @@ void
 plat_delay_ms(uint32_t count)
 {
 #ifdef Q_OS_WINDOWS
-    // On Win32 the accuracy of Sleep() depends on the timer resolution, which can be set by calling timeBeginPeriod
-    // https://learn.microsoft.com/en-us/windows/win32/api/timeapi/nf-timeapi-timebeginperiod
-    timeBeginPeriod(1);
     Sleep(count);
-    timeEndPeriod(1);
 #else
     QThread::msleep(count);
 #endif