Auto merge of #18241 - canaltinova:font-feature-values-lookup, r=emilio,xidorn

stylo: Implement font feature values lookup

This PR reviewed by emilio and xidorn on bugzilla. That is backed out because of Windows build problems. Fixed and landing it again.

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- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes [Bug 1355721](https://bugzilla.mozilla.org/show_bug.cgi?id=1355721)

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components/style/properties/properties.mako.rs

@@ -2730,12 +2730,13 @@ impl<'a> StyleBuilder<'a> {
         &mut self,
         value: longhands::${property.ident}::computed_value::T
     ) {
+        <% props_need_device = ["content", "list_style_type", "font_variant_alternates"] %>
         self.${property.style_struct.ident}.mutate()
             .set_${property.ident}(
                 value,
                 % if property.logical:
                 self.writing_mode,
-                % elif product == "gecko" and property.ident in ["content", "list_style_type"]:
+                % elif product == "gecko" and property.ident in props_need_device:
                 self.device,
                 % endif
             );