[Editor] Support svg images in the stamp annotation

createImageBitmap doesn't work with svg files (see bug 1841972), so we need to workaround
this in using an Image.
When printing/saving we must rasterize the image, hence we get the biggest bitmap as image
reference to avoid duplications or poor quality on rendering.

test/integration-boot.js

@@ -33,6 +33,7 @@ async function runTests(results) {
       "freetext_editor_spec.js",
       "ink_editor_spec.js",
       "scripting_spec.js",
+      "stamp_editor_spec.js",
     ],
   });