Render large images even if they're larger than the canvas limits (bug 1720282)

The idea is to encode large image in BMP format (which is very simple and doesn't
require to compute any checksums) and then use createImageBitmap with a BMP blob
(which doesn't suffer of the Canvas/ImageData limits).
From a performance point of view, it isn't crazy (generating a large blob + decoding
it on the main thread is really not ideal) but at least we've something to display
which is a way better than a blank page (and one can notice that most of the time is
spent in decoding the image from the pdf stream).

test/pdfs/issue6741.pdf.link

@@ -0,0 +1,2 @@
+https://github.com/mozilla/pdf.js/files/57455/DC000933-uncompressed.pdf
+

test/pdfs/issue8076.pdf.link

@@ -0,0 +1,2 @@
+https://github.com/mozilla/pdf.js/files/1135236/eID_Broschuere-page16.pdf
+

test/test_manifest.json

@@ -7378,5 +7378,21 @@
       "md5": "1eec7137e471a3d68a20855a04293b5b",
       "link": true,
       "type": "other"
+   },
+   {
+      "id": "issue6741",
+      "file": "pdfs/issue6741.pdf",
+      "md5": "ddbe6ccc7ae414c7ffa6c4110536730d",
+      "rounds": 1,
+      "link": true,
+      "type": "eq"
+   },
+   {
+      "id": "issue8076",
+      "file": "pdfs/issue8076.pdf",
+      "md5": "4a866bff4209956a6cfa2e2c9456f421",
+      "rounds": 1,
+      "link": true,
+      "type": "eq"
    }
 ]