RFR: 7903928: update build.gradle to use JDK 23 [v3]

[Athijegannathan Sundararajan]

> We've updated native makefile to use JDK 23 (
> https://github.com/openjdk/jextract/commit/0b89a462146940a2ec90e34eeb5df3d46d8980d2 )
> 
> While build.gradle works & expects jdk 23, it still refers to JDK var as "jdk22_home" and passes --release to be 22. Also jextract version is "22".

Athijegannathan Sundararajan has updated the pull request incrementally with one additional commit since the last revision:

  missed jdk23_home in test line

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

Changes:
  - all: https://git.openjdk.org/jextract/pull/271/files
  - new: https://git.openjdk.org/jextract/pull/271/files/d44a111c..309d83d3

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jextract&pr=271&range=02
 - incr: https://webrevs.openjdk.org/?repo=jextract&pr=271&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jextract/pull/271.diff
  Fetch: git fetch https://git.openjdk.org/jextract.git pull/271/head:pull/271

PR: https://git.openjdk.org/jextract/pull/271