Revert "Merge branch '241468-visibility-level' into 'master'"

What does this MR do?

This reverts !41014 (merged) which caused a regression creating snippets.

When creating a snippet you cannot see the snippet content after creation. I see the JS console error:

VM9122:1 Uncaught SyntaxError: Unexpected token u in JSON at position 0
    at JSON.parse (<anonymous>)
    at appFactory (index.js?8dc4:26)
    at SnippetShowInit (index.js?8dc4:46)
    at HTMLDocument.eval (snippet_show.js?2fda:16)

which links to this line of code !41014 (diffs)

Closes #245081 (closed) (QA failures on master and staging)

Screenshots

Does this MR meet the acceptance criteria?

Conformity

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

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers
• Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

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• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
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