[jdk17u-dev] RFR: 8353713: Improve Currency.getInstance exception handling

[Goetz Lindenmaier]

I backport this for parity with 17.0.17-oracle.

I resolved one test method because in 21 it uses Locale.of which is not in 17.

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Commit messages:
 - backport 5cac579619164b9a664327a4f71c4de7e7575276

Changes: https://git.openjdk.org/jdk17u-dev/pull/3754/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3754&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8353713
  Stats: 37 lines in 2 files changed: 12 ins; 0 del; 25 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3754.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3754/head:pull/3754

PR: https://git.openjdk.org/jdk17u-dev/pull/3754