style: Serialize NaN and infinity angles as per spec

`NaN`, `infinity`, and `-infinity` angles should be specially serialized.

Also fixed a few relevant WPT tests which did not follow spec.
(see https://github.com/web-platform-tests/wpt/pull/38825)

Adjusted WPT test expectations, 40 newly pass 🎉

Differential Revision: https://phabricator.services.mozilla.com/D171658

components/style/values/specified/calc.rs

@@ -836,7 +836,12 @@ impl CalcNode {
             Leaf::Angle(ref angle) => Ok(angle.degrees()),
             _ => Err(()),
         })?;
-        Ok(Angle::from_calc(crate::values::normalize(degrees)))
+        let result = Angle::from_calc(if nan_inf_enabled() {
+            degrees
+        } else {
+            crate::values::normalize(degrees)
+        });
+        Ok(result)
     }
 
     /// Tries to simplify this expression into a `<number>` value.