RFR: 8355022: Implement JEP 506: Scoped Values [v8]

[Chen Liang]

On Thu, 22 May 2025 15:09:12 GMT, Andrew Haley <aph at openjdk.org> wrote:

>> Propose to finalize scoped values.
>> The only functional change is that the orElse() method no longer accepts a null argument.
>
> Andrew Haley has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 11 commits:
> 
>  - Merge from JDK head
>  - Fix merge
>  - Fix merge
>  - Merge from https://github.com/openjdk/jdk
>  - ScopedValue::orElse() does not accept null as an argument.
>  - Remove unnecessary @since 25
>  - Remove unnecessary @enablePreview in some tests
>  - Since when?
>  - ScopedValue::orElse() does not accept null as an argument.
>  - 8355720: Implement JEP 506: Scoped Values
>  - ... and 1 more: https://git.openjdk.org/jdk/compare/12efc1fe...460d82bd

The latest master merge looks good.

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Marked as reviewed by liach (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/24923#pullrequestreview-2861915865