<i18n dev> RFR: 8366178: Implement JEP 526: Lazy Constants (Second Preview) [v8]

[Per Minborg]

> 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 with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 94 additional commits since the last revision:

 - Revert back to Object::(hashCode/equals)
 - Merge branch 'master' into lazy-constants
 - Update src/java.base/share/classes/java/lang/LazyConstant.java
   
   Co-authored-by: Maurizio Cimadamore <54672762+mcimadamore at users.noreply.github.com>
 - Define constant folding
 - Rephrase trusted field text
 - Reprhase text around the computing thread
 - Add links around Error and Throwable
 - Remove redundant field
 - Add optimization where the computing function is returned directly
 - Add benchmark of Optionals
 - ... and 84 more: https://git.openjdk.org/jdk/compare/6cbed094...8fa4a4ca

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/27605/files
  - new: https://git.openjdk.org/jdk/pull/27605/files/5845a7a5..8fa4a4ca

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27605&range=07
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27605&range=06-07

  Stats: 10612 lines in 265 files changed: 5868 ins; 4190 del; 554 mod
  Patch: https://git.openjdk.org/jdk/pull/27605.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27605/head:pull/27605

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