If the time server is restarted with a time in the past the net client
clock will not report the new time anymore as this would mean that the
clock moves back in time which it does not do.
Now the clock will be kept alive but marked as corrupted and will not
be re-used from the cache.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4802>
When detecting the remote time has been reset which may occur if remote
device providing the clock server has been power reset, then clock is
no longer synced. Setting clock state will trigger a signal to client
informing on sync lost making it possibility to take appropriate action.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/975>
