[jfx17u] RFR: 8340322: Update WebKit to 620.1

[Jose Pereda]

On Wed, 5 Mar 2025 08:17:16 GMT, Johan Vos <jvos at openjdk.org> wrote:

> Almost clean backport of JDK-8340322
> Manually changed:
> 
> * build.gradle minor change
> * modules/javafx.web/src/main/native/Source/WebCore/html/parser/HTMLElementStack.cpp because JDK-8344899 is not backported
> * modules/javafx.web/src/test/java/test/javafx/scene/web/CanvasTest.java because JDK-8339515 is not backported

Marked as reviewed by jpereda (Reviewer).

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PR Review: https://git.openjdk.org/jfx17u/pull/230#pullrequestreview-2660323313