Fix axios automatically parsing snippet content

What does this MR do?

This MR fixes #241199 (closed)

It looks like axios tries to smartly convert responses into JSON values... This causes issues when we really just want the raw string content.

Screenshots

It works 🎉

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

References

• Related to #241199 (closed)