timers-core-2022-05-23

  - Expose CLOCK_TAI to instrumentation to aid with TSN debugging.

  - Ensure that the clockevent is stopped when there is no timer armed to
    avoid pointless wakeups.

  - Make the sched clock frequency handling and rounding consistent.

  - Provide a better debugobject hint for delayed works. The timer callback
    is always the same, which makes it difficult to identify the underlying
    work. Use the work function as a hint instead.

  - Move the timer specific sysctl code into the timer subsystem.

  - The usual set of improvements and cleanups