RFR: 8331202: Support for Duration until another Instant [v3]

[Naoto Sato]

On Wed, 1 May 2024 17:21:20 GMT, Naoto Sato <naoto at openjdk.org> wrote:

>> A new method on Instant to return the duration `until` another Instant is suggested per the following discussion thread:
>> 
>> https://mail.openjdk.org/pipermail/core-libs-dev/2024-April/122131.html
>> 
>> A CSR has also been drafted.
>
> Naoto Sato has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Addressing CSR reviews

Hearing no further comments, integrating this PR.

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PR Comment: https://git.openjdk.org/jdk/pull/19007#issuecomment-2115651450