Issue Summary

When converting pages from TinyMCE (legacy) editor to the Fabric (new) editor/editing experience, all images become dynamic images.

For some customers, this may cause page layouts to be modified unintentionally.

Steps to Reproduce

1. Create a TinyMCE page with an image
   1. Notice that storage format will be:

      <ac:image ac:align="center" ac:layout="center" ac:original-height="245" ac:original-width="486" ac:width="910"><ri:attachment ri:filename="image-2024-9-9_14-24-7.png" ri:version-at-save="1" /></ac:image>
      

      There is a specified ac:width, but no ac:custom-width="true" attribute

2. Make a call to sitename.atlassian.net/wiki/rest/api/contentbody/convert/{format} endpoint with any valid format: view, styled_view, export_view, editor
3. Observe the page in fabric editor

Expected Results

Images retain fixed width behaviour as they did in TinyMCE editor

Actual Results

All images become dynamically sized images