Syntax harmonization lib api entities

What does this MR do?

After closing the merge request #16831 for the issue #60774 there were some syntax styling corrections open as discussed with @ayufan . This pull request fixes them.

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation created/updated or follow-up review issue created
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Performance and Testing

Code testing improvements are not needed since it's only syntax change.

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers

Security

As far as I know, it shouldn't include either but I leave it open to review.

• 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
• Security reports checked/validated by a reviewer from the AppSec team