RFR: 8343780: Add since checker tests to the Tools area modules and add missing @since to jdk.jfr.Recording [v4]

[Nizar Benalla]

> Can I please get a review for this PR that add tests to verify the value of `@since` tags to the Tools 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.
> 
> Notes: 
> - I have also added an `@since` tag that was missing.
> - You will notice there is no test for the `jdk.jfr` module, it will be added in a future PR because it requires special handling. (JFR used to be a commercial feature and this requires special handling to be added for it in the test)
> 
> TIA

Nizar Benalla has updated the pull request incrementally with one additional commit since the last revision:

  add a missing \@since tag to RecordingStream.onMetadata

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/21982/files
  - new: https://git.openjdk.org/jdk/pull/21982/files/83800e26..091fb283

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21982&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21982&range=02-03

  Stats: 3 lines in 1 file changed: 3 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/21982.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21982/head:pull/21982

PR: https://git.openjdk.org/jdk/pull/21982