RFR: 8331646: Add specific regression leap year tests [v5]

[Roger Riggs]

On Fri, 10 May 2024 09:22:39 GMT, serhiysachkov <duke at openjdk.org> wrote:

>> Calendar.add() tests that describe its behavior.
>
> serhiysachkov has updated the pull request incrementally with one additional commit since the last revision:
> 
>   JDK-8331646 fixing typo

A bit late but the descriptions of the problem should not be focused on leap years. 
Every add/subtract that involves indefinite month lengths has the same behavior when the result is clamped to the length of the month.

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

PR Comment: https://git.openjdk.org/jdk/pull/19082#issuecomment-2104799803