Fix snippets comments not displayed

What does this MR do?

Fix an issue where comments body were not displayed for project snippets anymore (see commit for details).

Are there points in the code the reviewer needs to double check?

No.

Why was this MR needed?

Because of #19388 (closed).

What are the relevant issue numbers?

Fixes #19388 (closed).

Does this MR meet the acceptance criteria?

• CHANGELOG entry added
• Tests
  • All builds are passing
• Conform by the style guides
• Branch has no merge conflicts with master (if you do - rebase it please)
• Squashed related commits together