[14] RFR (S) 8243464: Shenandoah: print statistic counters in time order

[Aleksey Shipilev]

Original RFE:
  https://bugs.openjdk.java.net/browse/JDK-8243464
  https://hg.openjdk.java.net/jdk/jdk/rev/d115f09c2dbf

This is a part of bulk backport of enhanced Shenandoah logging to 14u. The context is a bit
different, because there is no split between weak/strong roots in 14u.

14u webrev:
  https://cr.openjdk.java.net/~shade/8243464/wevrev.14u.01/

Testing: hotspot_gc_shenandoah, eyeballing gc logs

-- 
Thanks,
-Aleksey