Auto merge of #19220 - CYBAI:font-variant-east-asian-out-of-mako, r=emilio

style: Move font-variant-east-asian outside of mako

This is a sub-PR of #19015
r? emilio

---
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #19216
- [x] These changes do not require tests

<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/19220)
<!-- Reviewable:end -->

components/style/values/computed/font.rs

@@ -277,6 +277,9 @@ impl FontVariantAlternates {
     }
 }
 
+/// Use VariantEastAsian as computed type of FontVariantEastAsian
+pub type FontVariantEastAsian = specified::VariantEastAsian;
+
 /// font-language-override can only have a single three-letter
 /// OpenType "language system" tag, so we should be able to compute
 /// it and store it as a 32-bit integer

components/style/values/computed/mod.rs

@@ -37,7 +37,8 @@ pub use self::background::{BackgroundSize, BackgroundRepeat};
 pub use self::border::{BorderImageSlice, BorderImageWidth, BorderImageSideWidth};
 pub use self::border::{BorderRadius, BorderCornerRadius, BorderSpacing};
 pub use self::font::{FontSize, FontSizeAdjust, FontSynthesis, FontWeight, FontVariantAlternates};
-pub use self::font::{FontLanguageOverride, FontVariantSettings, MozScriptLevel, MozScriptMinSize, XTextZoom};
+pub use self::font::{FontLanguageOverride, FontVariantSettings, FontVariantEastAsian};
+pub use self::font::{MozScriptLevel, MozScriptMinSize, XTextZoom};
 pub use self::box_::{AnimationIterationCount, AnimationName, ScrollSnapType, VerticalAlign};
 pub use self::color::{Color, ColorPropertyValue, RGBAColor};
 pub use self::effects::{BoxShadow, Filter, SimpleShadow};