added related_topics as SynchronizedField

[danielfmiranda]

Description

Link to sample test page: https://foundation-s-299-relate-rtrq2d.herokuapp.com/en/blog/
Related PRs/issues: #9101

This PR adds related_topics to the Blog Index Page's as a SynchronizedField so changes to the list will be synchronized across translations.

Screenshots

Related Topics Box (EN) with "Mozilla Explains":

Related Topics Box (ES) with "Mozilla Explains:

Related Topics Box (EN) after removing "Mozilla Explains":

Related Topics Box (ES) after syncing translations:

Steps to test

1. Visit the English blog page, scroll to the related topics box, and note that "(EN) Advocacy" is featured.
2. Visit the French blog page, scroll to the related topics box, and note that "(FR) Advocacy" is featured.
3. Edit the blog index page in the CMS (credentials: admin2/admin2)
4. Uncheck "(EN) Advocacy" from the "related topics" section, and publish the page.
5. Sync page translations
6. Visit the English blog page, scroll to the related topics box, and note that "(EN) Advocacy" is no longer featured.
7. Visit the French blog page, scroll to the related topics box, and note that "(FR) Advocacy" is no longer featured.
8. If everything is working as expected, testing is complete!

┆Issue is synchronized with this Jira Story

[TheoChevalier]

Thank you! Works great

[jhonatan-lopes]

Great sleuthing @danielfmiranda! Awesome find!

[robdivincenzo]

Nice find @danielfmiranda!

[data-sync-user]

➤ Simon Acosta Torres commented:

This PR was merged on April 19th.