RFR: Update GHA for jdk22

Fri Oct 20 18:10:08 UTC 2023

Update GHA to run on jdk 22. Also switched the gradle runner JDK to 17, since that is LTS with Oracle (which is where we get it from).

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Commit messages:
 - Fix mac JAVA path
 - Update for jdk 22

Changes: https://git.openjdk.org/jextract/pull/134/files
 Webrev: https://webrevs.openjdk.org/?repo=jextract&pr=134&range=00
  Stats: 16 lines in 1 file changed: 0 ins; 0 del; 16 mod
  Patch: https://git.openjdk.org/jextract/pull/134.diff
  Fetch: git fetch https://git.openjdk.org/jextract.git pull/134/head:pull/134

PR: https://git.openjdk.org/jextract/pull/134