RFR: 8317868: Add @sealedGraph to MethodHandleDesc and descendants [v2]

[Per Minborg]

On Wed, 11 Oct 2023 11:18:41 GMT, Per Minborg <pminborg at openjdk.org> wrote:

>> This PR proposes to add  @sealedGraph to MethodHandleDesc and descendants.
>
> Per Minborg has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - Update copyright year
>  - Revoke change in DMHD

Any reviewers on this very small PR?

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PR Comment: https://git.openjdk.org/jdk/pull/16137#issuecomment-1767744163