RFR: 8353713: Improve Currency.getInstance exception handling [v2]

[Justin Lu]

> Please review this PR which improves some Currency `IllegalArgumentException`s by including the input in the message. This could be a currency code, country code, or locale. This change also includes tests to check the messages for an invalid country via the region override as well as an invalid country code within a 3 length currency code.

Justin Lu has updated the pull request incrementally with one additional commit since the last revision:

  Naoto's review -> use str literal since not param test

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Changes:
  - all: https://git.openjdk.org/jdk/pull/24459/files
  - new: https://git.openjdk.org/jdk/pull/24459/files/e79241d0..dab5091b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24459&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24459&range=00-01

  Stats: 4 lines in 1 file changed: 0 ins; 1 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/24459.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24459/head:pull/24459

PR: https://git.openjdk.org/jdk/pull/24459