WordPress embeds mistakenly load Chatrix JavaScript

[swissspidy]

If you embed a make/core post such as https://make.wordpress.org/core/2024/02/27/i18n-improvements-6-5-performant-translations/embed/ for example, they unnecessarily load the https://make.wordpress.org/core/wp-content/plugins/chatrix/build/logout.iife.js?ver=0.9.0 JS file.

That should not be loaded for embeds and causes console errors because the embed iframes are sandbox, so the JS can't access the document global variable anyway.

To reproduce:

1. Visit https://make.wordpress.org/core/2024/02/27/i18n-improvements-6-5-performant-translations/embed/ in an incognito window
2. See the JS file being loaded

Originally reported at https://meta.trac.wordpress.org/ticket/7532