layout: Make geom.rs logical geoemetry types more ergonomic (#32633)

Make using the logical geometry types more ergonomic by having them all
implement `Copy` (at most 4 64-bit numbers), similar to what `euclid`
does. In addition add an implementation of `Neg` for `LogicalVec` and
`LogicalSides` as it will be used in upcoming table implementation code.

components/layout_2020/display_list/mod.rs

@@ -617,7 +617,7 @@ impl<'a> BuilderForBoxFragment<'a> {
 
         let radii = inner_radii(
             self.border_radius,
-            (&self.fragment.border + &self.fragment.padding)
+            (self.fragment.border + self.fragment.padding)
                 .to_physical(self.fragment.style.writing_mode)
                 .to_webrender(),
         );