RFR: 8343781: Add since checker test to the Serviceability area modules

[Chris Plummer]

On Fri, 8 Nov 2024 15:20:00 GMT, Nizar Benalla <nbenalla at openjdk.org> wrote:

> Can I please get a review for this PR that add tests to verify the value of `@since` tags to the Serviceability area modules. The test is described in this [email](https://mail.openjdk.org/pipermail/jdk-dev/2024-October/009474.html). This issue is similar to JDK-8341399, JDK-8331051 and JDK-8343442.
> 
> The benefit from this is helping API authors and reviewer validate the accuracy of `@since` in their source code (and subsequently, in the generated documentation). And lessen the burden on Reviewers.
> 
> The test has been added for `java.base` and a few other modules and has helped catch some bugs before they make it to the JDK.
> 
> TIA

Marked as reviewed by cjplummer (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/21983#pullrequestreview-2430427570