RFR: 8162: Update OptionsCheckRule to JDK21 [v3]

[Alex Macdonald]

On Sat, 13 Jan 2024 17:19:42 GMT, Henrik Dafgård <hdafgard at openjdk.org> wrote:

>> Brings the OptionsCheckRule up to date with the state of JVM flags as of JDK 21.
>
> Henrik Dafgård has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update copyright years

Marked as reviewed by aptmac (Reviewer).

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PR Review: https://git.openjdk.org/jmc/pull/542#pullrequestreview-1823719866