[jdk21u-dev] RFR: 8347841: Test fixes that use deprecated time zone IDs

[Goetz Lindenmaier]

I backport this for parity with 21.0.10-oracle.

Resolved because "8174269: Remove COMPAT locale data provider from JDK" is not in 21.
One chunk in Bug6329116 due to context, the others all copyright and @bug statement.

These are the files touched:
test/jdk/java/text/Format/DateFormat/DateFormatRegression.java
test/jdk/java/text/Format/DateFormat/DateFormatTest.java
test/jdk/java/util/PluggableLocale/TimeZoneNameProviderTest.java
test/jdk/java/util/TimeZone/Bug6329116.java
test/jdk/java/util/TimeZone/TimeZoneRegression.java

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Commit messages:
 - backport 81912e958ba77c1c9371305ecfedad13aaa3fa6a

Changes: https://git.openjdk.org/jdk21u-dev/pull/2329/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2329&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8347841
  Stats: 213 lines in 27 files changed: 67 ins; 34 del; 112 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2329.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2329/head:pull/2329

PR: https://git.openjdk.org/jdk21u-dev/pull/2329