[jfx17u] RFR: 8272329: Cherry pick GTK WebKit 2.32.3 changes

[Kevin Rushforth]

Clean backport to `jfx17u`. This has been tested on all platforms along with other pending fixes in the `test-kcr-17.0.1` branch.

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Commit messages:
 - 8272329: Cherry pick GTK WebKit 2.32.3 changes

Changes: https://git.openjdk.java.net/jfx17u/pull/8/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jfx17u&pr=8&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8272329
  Stats: 341 lines in 61 files changed: 193 ins; 9 del; 139 mod
  Patch: https://git.openjdk.java.net/jfx17u/pull/8.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx17u pull/8/head:pull/8

PR: https://git.openjdk.java.net/jfx17u/pull/8