[lworld] RFR: 8327636: [lworld] Make primitive wrappers be value class if preview feature is enabled [v2]

[Mandy Chung]

> As specified in JEP 401, when preview features are enabled, the following standard library classes are considered to be value classes:
> 
>     java.lang.Byte
>     java.lang.Short
>     java.lang.Integer
>     java.lang.Long
>     java.lang.Float
>     java.lang.Double
>     java.lang.Boolean
>     java.lang.Character
>     java.util.Optional
>     java.lang.Number
>     java.lang.Record
> 
> 
> These value classes are loaded only if --enable-preview is set.    All valhalla tests should have preview enabled to ensure testing with the proper set of library classes.
> 
> Testing: Run `jdk_valhalla` and `hotspot_valhalla_runtime` with  `-Xint` with and without `--enable-preview`.  The result is pretty good.  [JDK-8327637](https://bugs.openjdk.org/browse/JDK-8327637) and [JDK-8327639](https://bugs.openjdk.org/browse/JDK-8327639) need further investigation.

Mandy Chung has updated the pull request incrementally with one additional commit since the last revision:

  Removed duplicated Record

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

Changes:
  - all: https://git.openjdk.org/valhalla/pull/1040/files
  - new: https://git.openjdk.org/valhalla/pull/1040/files/8f981c2f..ff15f65e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=valhalla&pr=1040&range=01
 - incr: https://webrevs.openjdk.org/?repo=valhalla&pr=1040&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/valhalla/pull/1040.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1040/head:pull/1040

PR: https://git.openjdk.org/valhalla/pull/1040