LibWeb/SVG: Mark SVG factory functions as [NewObject]

Corresponds to https://github.com/w3c/svgwg/commit/9991813a66734957a4c3f6438641bddc2e081633

Libraries/LibWeb/SVG/SVGSVGElement.idl

@@ -20,14 +20,14 @@ interface SVGSVGElement : SVGGraphicsElement {
 
     undefined deselectAll();
 
-    // FIXME: SVGNumber createSVGNumber();
-    SVGLength createSVGLength();
-    [FIXME] SVGAngle createSVGAngle();
-    DOMPoint createSVGPoint();
-    DOMMatrix createSVGMatrix();
-    DOMRect createSVGRect();
-    SVGTransform createSVGTransform();
-    [FIXME] SVGTransform createSVGTransformFromMatrix(optional DOMMatrix2DInit matrix = {});
+    // FIXME: [NewObject] SVGNumber createSVGNumber();
+    [NewObject] SVGLength createSVGLength();
+    [FIXME, NewObject] SVGAngle createSVGAngle();
+    [NewObject] DOMPoint createSVGPoint();
+    [NewObject] DOMMatrix createSVGMatrix();
+    [NewObject] DOMRect createSVGRect();
+    [NewObject] SVGTransform createSVGTransform();
+    [FIXME, NewObject] SVGTransform createSVGTransformFromMatrix(optional DOMMatrix2DInit matrix = {});
 
     Element? getElementById(DOMString elementId);