[wall_clock_breakdown] always log stats when enabled (#7617)
currently when main logger is WARN level, `wall_clock_breakdown: true`
never logs - which is invalid as it disables this crucial at times
functionality. Plus I think we have a disconnect somewhere since the
recently added `--log_level` flag doesn't seem to change this logger's
level.
The future plan is to be able to have different log levels for different
modules, but for now just use `print` if `wall_clock_breakdown` is
`True`, so this functionality is not log-level dependent.
`print` is also less noisy than the logger, because of the long prefix
generated by the latter, which is of no value to the user since we print
stats and not code related logs, so the printed results are easier to
digest.
Signed-off-by: Stas Bekman <stas@stason.org>
