RFR: 8341399: Add since checker tests to the langtools modules [v3]

[Nizar Benalla]

> Can I get a review for this patch that adds `@since` checker tests to the following modules: java.compiler, jdk.compiler, jdk.javadoc and jdk.jdeps. The initial test for `java.base` has been integrated in [JDK-8331051](https://bugs.openjdk.org/browse/JDK-8331051). 
> 
> The jtreg comments are almost the same as the ones for the `java.base` test, only the Bug ID and the module name being passed to the test are different.
> 
> I've made a small change to `test/jdk/TEST.groups` to include the new tests.
> 
> Here are the emails  [[1](https://mail.openjdk.org/pipermail/jdk-dev/2024-June/009160.html)] [[2](https://mail.openjdk.org/pipermail/jdk-dev/2024-October/009474.html)] in `jdk-dev` describing how the tests work and how to run them.
> 
> TIA

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

  since checks should be under modules directory

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/21542/files
  - new: https://git.openjdk.org/jdk/pull/21542/files/d8590019..408ae6d7

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21542&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21542&range=01-02

  Stats: 0 lines in 3 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/21542.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21542/head:pull/21542

PR: https://git.openjdk.org/jdk/pull/21542