[SVGPreview]Handle comments properly (#28863)

* [SVGPreview] Handle comments properly

* f: spelling

* f: add tolerance to the bitmap eq test

* f: remove bitmap eq testing, since it doesn't work on CI for some reason

* f: parsing issue

src/modules/previewpane/UnitTests-SvgThumbnailProvider/HelperFiles/WithComments.svg

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 27.5.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+
+<!-- Generator: Adobe Illustrator 27.5.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<svg viewBox="0 0 100 100"
+    xmlns="http://www.w3.org/2000/svg">
+    <circle cx="50"
+        cy="50"
+        fill="rgba(0, 0, 255, 1)"
+        r="50">
+        <script>alert("valid-message")</script>
+    </circle>
+</svg>
+
+<!-- Generator: Adobe Illustrator 27.5.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->