RFR: 7904029: jcstress: Explicitly enable annotation processors to fix build artifacts on JDK 23+ [v4]

[Pavel Rappo]

> In addition to fixing the annotation processing, I also fixed a few "dangling doc comment" warnings I missed earlier in #162. These comments cause build failure on their own.

Pavel Rappo has updated the pull request incrementally with one additional commit since the last revision:

  Respond to feedback
  
  Partially revert 2385cbd311cc5ca4f25e82da8162adb5a4577e0e, to return
  the annotation processor configuration.

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Changes:
  - all: https://git.openjdk.org/jcstress/pull/164/files
  - new: https://git.openjdk.org/jcstress/pull/164/files/2385cbd3..c7eec5b8

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jcstress&pr=164&range=03
 - incr: https://webrevs.openjdk.org/?repo=jcstress&pr=164&range=02-03

  Stats: 24 lines in 1 file changed: 24 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jcstress/pull/164.diff
  Fetch: git fetch https://git.openjdk.org/jcstress.git pull/164/head:pull/164

PR: https://git.openjdk.org/jcstress/pull/164