style: Un-prefix -moz-tab-size (keeping the prefixed version as an alias for now)

This results in lots of new WPT test passes.

There were also a couple of WPT tests that turned out to be broken;
tab-size-inline-001 and -002 had errors in their reference files such
that they'd never pass anywhere. So those are fixed here.

Depends on D117331

Differential Revision: https://phabricator.services.mozilla.com/D117332

components/style/values/generics/length.rs

@@ -235,7 +235,7 @@ impl<LengthPercentage> MaxSize<LengthPercentage> {
     }
 }
 
-/// A generic `<length>` | `<number>` value for the `-moz-tab-size` property.
+/// A generic `<length>` | `<number>` value for the `tab-size` property.
 #[derive(
     Animate,
     Clone,