[jdk17u-dev] RFR: 8282047: Enhance StringDecode/Encode microbenchmarks [v2]

[Boris Ulasevich]

> This change is a backport of "8282047: Enhance StringDecode/Encode microbenchmarks" commit - a benchmarks update as a part of subsequent [JDK-8281146](https://bugs.openjdk.org/browse/JDK-8281146) change.

Boris Ulasevich has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:

  8282047: Enhance StringDecode/Encode microbenchmarks

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Changes:
  - all: https://git.openjdk.org/jdk17u-dev/pull/666/files
  - new: https://git.openjdk.org/jdk17u-dev/pull/666/files/29d4b9ea..bb7f8a28

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=666&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=666&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/666.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/666/head:pull/666

PR: https://git.openjdk.org/jdk17u-dev/pull/666