RFR: 7903917: Changes needed for jdk23-based makefile build [v3]

[Nizar Benalla]

> Changes necessary to bump the supported version to JDK 23.
> Passes tier 1.
> 
> Note: This PR will not be integrated before https://github.com/openjdk/jextract/pull/264 as the removal of `--enable-preview` is needed.

Nizar Benalla has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains three commits:

 - Merge remote-tracking branch 'upstream/master' into CODETOOLS-7903917
   
   # Conflicts:
   #	make/Build.gmk
 - remove --release flag
 - CODETOOLS-7903917

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Changes: https://git.openjdk.org/jextract/pull/265/files
  Webrev: https://webrevs.openjdk.org/?repo=jextract&pr=265&range=02
  Stats: 2 lines in 1 file changed: 0 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jextract/pull/265.diff
  Fetch: git fetch https://git.openjdk.org/jextract.git pull/265/head:pull/265

PR: https://git.openjdk.org/jextract/pull/265