RFR: 8366178: Implement JEP 526: Lazy Constants (Second Preview) [v24]

[Per Minborg]

On Mon, 10 Nov 2025 14:59:03 GMT, Per Minborg <pminborg at openjdk.org> wrote:

>> Implement JEP 526: Lazy Constants (Second Preview)
>> 
>> The lazy list/map implementations are broken out from `ImmutableCollections` to a separate class.
>> 
>> The old benchmarks are not moved/renamed to allow comparison with previous releases.
>> 
>> `java.util.Optional` is updated so that its field is annotated with `@Stable`.  This is to allow `Optional` instances to be held in lazy constants and still provide constant folding.
>
> Per Minborg has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add @AOTSafeClassInitializer

As per https://github.com/openjdk/jdk/pull/27605/commits/e479cb4bbe54f3e0caa129cc45aec2ec2bffd9cf, this PR passes tier 1-4 on multiple platforms.

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

PR Comment: https://git.openjdk.org/jdk/pull/27605#issuecomment-3515424778