Access denied and other issues when changing a revision entity language and saving a draft

- Enable content_translation & content moderation
- Make English as default language and add another i.e. German.
- Enable editorial workflow for content (i.e. article & Basic page)
- from 'admin/config/regional/content-language' enable translation for article and basic page and check 'Show language selector on create and edit pages'.
- Create and publish an article and ensure the selected language for the node edit is english.
- Edit the node again and change the language to German and save as a draft.
- Access denied upon saving, because the redirect is to /node/{nid}/latest which doesn't technically exist, because...
- The draft in the selected language is treated as a draft translation rather than a revision of the original node.
- Deleting the created translation, deletes the entire node including the published original.

Excepted Behavior:
TBD

Proposed Solution:
- Disable changing the entity language when creating a draft version of a node.