=act, ker, rem, doc #16330 deprecate akka.util.Crypt

* deprecate akka.util.Crypt
* fix documentation after deprecating
Merge pull request #16530 from skrauchenia/fix/16330-akka-util-Crypt-deprecate-skrauchenia

=act #16330 deprecating akka.util.Crypt
+ akka-cluster-metrics: new akka module
* new akka module split from akka-cluster
* provide sigar provisioning
* fix ewma usage
* resolve #16121
* see #16354
make strategy private
use sigar proxy closer