fix: added normalization to images added with the image tool to prevent MIME-mismatches (#10018)

* fix: fixed a bug where a MIME-mismatch in an image would cause an error to update cache

* fix: fixed a bug where a MIME-mismatch in an image would cause an error to update cache

* normalize inside insertImages()

---------

Co-authored-by: Mårten Mossberg <marmo607@student.liu.se>
Co-authored-by: dwelle <5153846+dwelle@users.noreply.github.com>

packages/excalidraw/components/App.tsx

@@ -10461,7 +10461,10 @@ class App extends React.Component<AppProps, AppState> {
     const initialized = await Promise.all(
       placeholders.map(async (placeholder, i) => {
         try {
-          return await this.initializeImage(placeholder, imageFiles[i]);
+          return await this.initializeImage(
+            placeholder,
+            await normalizeFile(imageFiles[i]),
+          );
         } catch (error: any) {
           this.setState({
             errorMessage: error.message || t("errors.imageInsertError"),