[jdk21u] RFR: 8316540: StoreReproducibilityTest fails on some locales

[Zdenek Zambersky]

Backport fixing issue in StoreReproducibilityTest.java causing failure on some locales.

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Commit messages:
 - Backport f7578e8048ee961f22b57ee2b7eed9e9ab783cf5

Changes: https://git.openjdk.org/jdk21u/pull/221/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u&pr=221&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8316540
  Stats: 18 lines in 1 file changed: 4 ins; 0 del; 14 mod
  Patch: https://git.openjdk.org/jdk21u/pull/221.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u.git pull/221/head:pull/221

PR: https://git.openjdk.org/jdk21u/pull/221