Resolve "Private profile help url should not toggle checkbox"

What does this MR do?

By default, the click events inside a label will toggle the checkbox.

This fix avoids the checkbox on the 'Private profile' setting from being toggled when a user clicks on the help icon next to it.

Before checkbox_before

After checkbox_after

What are the relevant issue numbers?

https://gitlab.com/gitlab-org/gitlab-ce/issues/51476

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• Tests added for this feature/bug
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides

Closes #51476 (closed)