Integrated: 8366178: Implement JEP 526: Lazy Constants (Second Preview)

[Per Minborg]

On Thu, 2 Oct 2025 10:51:08 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.

This pull request has now been integrated.

Changeset: f9464499
Author:    Per Minborg <pminborg at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/f94644999766e752f7d60ce52c14a7db79005035
Stats:     8347 lines in 60 files changed: 3738 ins; 4490 del; 119 mod

8366178: Implement JEP 526: Lazy Constants (Second Preview)
8371882: Improve documentation for JEP 526: Lazy Constants

Reviewed-by: jvernee, mcimadamore

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PR: https://git.openjdk.org/jdk/pull/27605