+str #15223 `timed` extra combinators for Duct
Note: not too happy about duplication of impl, but is required due to
the Flow and Duct not sharing any types (could use structural, not going there though).

Resolves #15223
Merge pull request #15225 from ktoso/wip-timed-duct-ktoso

+str Timed ops for Duct[I, O]
+proj,ben #15180 adding akka-bench-jmh, JMH benchmarks

How to use:
```
project akka-bench-jmh
run -i 1 -wi 1 -v extra -f 0
```

Added a few benchmarks for basics like
* actor ! // probably skewed currently
* event stream subscribing
* event stream publishing
* actor creation