[Chapel Merge] Mark timezones as unstable in DateTime module

Branch: refs/heads/main
Revision: 0d6b1b9
Author: daviditen
Link: Mark timezones as unstable in DateTime module by daviditen · Pull Request #19907 · chapel-lang/chapel · GitHub
Log Message:

Merge pull request #19907 from daviditen/datetime-timezones

Mark timezones as unstable in DateTime module

[reviewed by @dlongnecke-cray]

Mark timezones as unstable in the DateTime module. They are changing in the
modules 2.0 stabilization effort.

Much of this is @aconsroe-hpe's work from issue #18941.

Modified Files:
A test/library/standard/DateTime/unstableTimezones.chpl

A test/library/standard/DateTime/unstableTimezones.compopts
A test/library/standard/DateTime/unstableTimezones.good
M modules/standard/DateTime.chpl

Compare: https://github.com/chapel-lang/chapel/compare/b1f1abb19a39...0d6b1b982e9e