Auto merge of #19388 - BorisChiou:stylo/dommatrix/parser, r=emilio,heycam

stylo: Implement Servo_ParseTransformIntoMatrix

This is an inter-dependent patch of Bug 1408310.

DOMMatrix needs to convert a specified transform list into a matrix, so we rewrite
to_transform_3d_matrix by generics for both specified and computed transform lists.

---
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix [Bug 1408310](https://bugzilla.mozilla.org/show_bug.cgi?id=1408310).
- [X] These changes do not require tests because we can count on the wpt tests for DOMMatrix on Gecko side.

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components/style/gecko/generated/bindings.rs

@@ -1577,6 +1577,8 @@ extern "C" {
  pub fn Servo_ComputeColor ( set : RawServoStyleSetBorrowedOrNull , current_color : nscolor , value : * const nsAString , result_color : * mut nscolor , ) -> bool ; 
 } extern "C" {
  pub fn Servo_ParseIntersectionObserverRootMargin ( value : * const nsAString , result : * mut nsCSSRect , ) -> bool ; 
+} extern "C" {
+ pub fn Servo_ParseTransformIntoMatrix ( value : * const nsAString , contains_3d_transform : * mut bool , result : * mut RawGeckoGfxMatrix4x4 , ) -> bool ;
 } extern "C" {
  pub fn Gecko_CreateCSSErrorReporter ( sheet : * mut ServoStyleSheet , loader : * mut Loader , uri : * mut nsIURI , ) -> * mut ErrorReporter ; 
 } extern "C" {
@@ -1587,4 +1589,4 @@ extern "C" {
  pub fn Gecko_ContentList_AppendAll ( aContentList : * mut nsSimpleContentList , aElements : * mut * const RawGeckoElement , aLength : usize , ) ; 
 } extern "C" {
  pub fn Gecko_GetElementsWithId ( aDocument : * const nsIDocument , aId : * mut nsAtom , ) -> * const nsTArray < * mut Element > ; 
-}
+}