RFR: JDK-8318761: MessageFormat pattern support for CompactNumberFormat, ListFormat, and DateTimeFormatter

[Justin Lu]

Please review this PR and [CSR](https://bugs.openjdk.org/browse/JDK-8319344) which adds MessageFormat pattern support for the following subformats: ListFormat, CompactNumberFormat, and DateTimeFormatter. This change is intended to provide pattern support for the more recently added JDK Format subclasses, as well as improving java.time formatting within i18n. The draft javadoc can be viewed here: https://cr.openjdk.org/~jlu/docs/api/java.base/java/text/MessageFormat.html. Please see the CSR for more in-depth behavioral changes, as well as limitations.

The `FormatTypes`:  dtf_date, dtf_time, dtf_datetime, pre-defined DateTimeFormatter(s), and list are added.
The `FormatStyles`: compact_short, compact_long, or, and unit are added.

For example, previously,


Object[] args = {LocalDate.of(2023, 11, 16), LocalDate.of(2023, 11, 27)};
MessageFormat.format("It was {0,date,full}, now it is {1,date,full}", args);


would throw `Exception java.lang.IllegalArgumentException: Cannot format given Object as a Date`

Now, a user can call


MessageFormat.format("It was {0,dtf_date,full}, now it is {1,dtf_date,full}", args);


which returns "It was Thursday, November 16, 2023, now it is Friday, November 17, 2023"

-------------

Commit messages:
 - init

Changes: https://git.openjdk.org/jdk/pull/17663/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17663&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8318761
  Stats: 1166 lines in 6 files changed: 871 ins; 198 del; 97 mod
  Patch: https://git.openjdk.org/jdk/pull/17663.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17663/head:pull/17663

PR: https://git.openjdk.org/jdk/pull/17663