ICU-22526 Allow GMT-23:59 time zone

[FrankYFTang]

ECMA402 now allow offset timezone from -23:59 to 23:59. We need to lower the minimum ZONE_OFFSET value to -23:59

Checklist

• Required: Issue filed: https://unicode-org.atlassian.net/browse/ICU-22526
• Required: The PR title must be prefixed with a JIRA Issue number.
• Required: The PR description must include the link to the Jira Issue, for example by completing the URL in the first checklist item
• Required: Each commit message must be prefixed with a JIRA Issue number.
• Issue accepted (done by Technical Committee after discussion)
• Tests included, if applicable
• API docs and/or User Guide docs changed or added, if applicable

[FrankYFTang]

I have problem to build/test java in my desktop now. So I will work on a separate Java PR for that once I resolve that.

[FrankYFTang]

This fix is needed for JS engine to implmenent tc39/ecma402#788 @sffc @anba

[jira-pull-request-webhook]

Notice: the branch changed across the force-push!

• icu4j/main/core/src/main/java/com/ibm/icu/util/Calendar.java is now changed in the branch
• icu4j/main/core/src/test/java/com/ibm/icu/dev/test/timezone/TimeZoneTest.java is now changed in the branch

View Diff Across Force-Push

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