RFR: 8336632: Update Gradle to 8.9

[Ambarish Rapte]

Gradle 8.8 released on May 31, 2024, supports JDK 22.
On Jul 11, 2024, gradle 8.9 was released too, so we can update to the latest gradle 8.9 

This gradle update is required in order to update the boot jdk to 22.0.2.
The changes are minimal, no source code changes were required.

This PR also includes the boot jdk update.

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Commit messages:
 - chmod 644 gradlew
 - gradle 89, jdk 2202
 - revert gradle-wrapper.properties partially
 - gradle 8.9

Changes: https://git.openjdk.org/jfx/pull/1539/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1539&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8336632
  Stats: 32 lines in 7 files changed: 5 ins; 0 del; 27 mod
  Patch: https://git.openjdk.org/jfx/pull/1539.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1539/head:pull/1539

PR: https://git.openjdk.org/jfx/pull/1539