RFR: 8340003: Bump minimum JDK version for JavaFX to JDK 22

[Kevin Rushforth]

This PR bumps the minimum version of the JDK needed to run JavaFX to JDK 22.

In order for JavaFX to be able to use newer JDK features, such as FFM, we need to increase the minimum version of the JDK required run the latest JavaFX. Additionally, there is an ongoing cost to keeping JavaFX buildable and runnable on older versions of Java, and little reason to continue to do so.

This is targeted to JavaFX 24, and _must not_ be backported to any earlier version. This needs a CSR and a release note.

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Commit messages:
 - Merge branch 'master' into 8340003-min-jdk-22
 - 8340003: Bump minimum JDK version for JavaFX to JDK 22

Changes: https://git.openjdk.org/jfx/pull/1588/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1588&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8340003
  Stats: 4 lines in 2 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jfx/pull/1588.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1588/head:pull/1588

PR: https://git.openjdk.org/jfx/pull/1588