[lworld] RFR: 8294462: [lworld] Add jdk.internal.misc.ValhallaFeatures to reflect -XX:+EnableValhalla [v3]

[Mandy Chung]

On Tue, 27 Sep 2022 21:35:24 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

>> Updated to set the system property after all of the option setting locations have been processed.
>> Verified via -XshowSettings.
>
> Roger Riggs has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add jdk.internal.misc.ValhallaFeatures, similar to PreviewFeatures
>   based on the -XX:+/-EnableValhalla command line flag.
>   Removed the "valhalla.enableValhalla" System property.
>   It is unused and not wanting test or app code to depend on it.

Marked as reviewed by mchung (Committer).

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PR: https://git.openjdk.org/valhalla/pull/769