[jdk21u-dev] RFR: 8365790: Shutdown hook for application image does not work on Windows

[Goetz Lindenmaier]

Clean backport from 25, but it needed adaptions to Java 21.

In 21, Instant does not have a method until().  See second commit.

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Commit messages:
 - Adapt TKit to Java 21
 - backport 8b686d9ee4669d31b306d7a3337a0b57e95c9a4c

Changes: https://git.openjdk.org/jdk21u-dev/pull/2452/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2452&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8365790
  Stats: 401 lines in 9 files changed: 358 ins; 4 del; 39 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2452.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2452/head:pull/2452

PR: https://git.openjdk.org/jdk21u-dev/pull/2452