RFR: 8363972: Loose matching of dash/minusSign in number parsing

[Naoto Sato]

Enabling lenient minus sign matching when parsing numbers. In some locales, e.g. Finnish, the default minus sign is the Unicode "Minus Sign" (U+2212), which is not the "Hyphen Minus" (U+002D) that users type in from keyboard. Thus the parsing of user input numbers may fail. This change utilizes CLDR's `parseLenient` element for minus signs and loosely matches them with the hyphen-minus so that user input numbers can parse. As this is a behavioral change, a corresponding CSR has been drafted.

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Commit messages:
 - Merge branch 'master' into JDK-8363972-Loose-matching-dash
 - tidying up
 - test location
 - spec update
 - readObject
 - Merge branch 'master' into JDK-8363972-Loose-matching-dash
 - lenientminus -> NumberElements
 - lenientMinusSign -> serial, moved to NumberElements
 - tentative
 - initial commit

Changes: https://git.openjdk.org/jdk/pull/26580/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26580&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8363972
  Stats: 386 lines in 8 files changed: 351 ins; 20 del; 15 mod
  Patch: https://git.openjdk.org/jdk/pull/26580.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26580/head:pull/26580

PR: https://git.openjdk.org/jdk/pull/26580