test: Add OpenJDK JMH for creating microbenchmarks in JMeter code

[vlsi]

Description

This enables creating benchmark for tracking performance of low-level code.

The way to add a benchmark is to add src/jmh folder (side by side with src/main). Then benchmark jar can be generated with ./gradlew jmhJar, or the benchmark can be executed from IDE if there's a corresponding main method.

See ResultCollectorBenchmark

Motivation and Context

We need measure performance for optimizations we make. For instance, improvements to properties, synchronization, etc should be validated.

Here's a sample output for ResultCollectorBenchmark:

Benchmark                                                    (success)  Mode  Cnt   Score    Error   Units
ResultCollectorBenchmark.isSampleWanted                           true  avgt    5   7,039 ±  0,160   ns/op
ResultCollectorBenchmark.isSampleWanted:·gc.alloc.rate            true  avgt    5  ≈ 10⁻³           MB/sec
ResultCollectorBenchmark.isSampleWanted:·gc.alloc.rate.norm       true  avgt    5  ≈ 10⁻⁶             B/op
ResultCollectorBenchmark.isSampleWanted:·gc.count                 true  avgt    5     ≈ 0           counts