RFR: Merge jdk19

[Jesper Wilhelmsson]

Forwardport JDK 19 -> JDK 20

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Commit messages:
 - Merge
 - 8286176: Add JNI_VERSION_19 to jni.h and JNI spec
 - 8287401: jpackage tests failing on Windows due to powershell issue
 - 8288534: Out of bound errors for memory segment access mentions wrong values

The merge commit only contains trivial merges, so no merge-specific webrevs have been generated.

Changes: https://git.openjdk.org/jdk/pull/9197/files
  Stats: 50 lines in 14 files changed: 25 ins; 3 del; 22 mod
  Patch: https://git.openjdk.org/jdk/pull/9197.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9197/head:pull/9197

PR: https://git.openjdk.org/jdk/pull/9197