RFR: 8316851: Add @sealedGraph to Executable

[Joe Darcy]

On Mon, 25 Sep 2023 08:11:48 GMT, Per Minborg <pminborg at openjdk.org> wrote:

> This PR proposes to add the @sealedGraph tag to `java.lang.reflect.Executable`.

Please update the copyright year before pushing.

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Marked as reviewed by darcy (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/15897#pullrequestreview-1642582767