[jdk17u-dev] RFR: 8308880: [17u] micro bench ZoneStrings missed in backport of 8278434

[Goetz Lindenmaier]

I missed this test in backport of 8278434. Clean copy from the original change.

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Commit messages:
 - 8308880: [17u] micro bench ZoneStrings missed in backport of 8278434

Changes: https://git.openjdk.org/jdk17u-dev/pull/1400/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1400&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8308880
  Stats: 44 lines in 1 file changed: 44 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1400.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1400/head:pull/1400

PR: https://git.openjdk.org/jdk17u-dev/pull/1400