Hide annotations from viewFeedback if it has not been released

[fanpu]

Description

Students, please do not look at this PR as it details an info-leak bug.

Go away now!

---

There is a bug where students can view unreleased annotations via the viewFeedback page for autograding feedback:

This PR fixes the bug by adding a check that grades have been released before showing annotations:

Motivation and Context

Bug fix

How Has This Been Tested?

1. Create hello lab, add Style problem
2. Student submits, gets autograded score
3. Instructor adds annotations on style
4. Student clicks on autograded score to go to viewFeedback page, sees Remarks with annotation text at the bottom. Able to determine style score based on this. Students can see style even before the instructors have decided to release all grades.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My change requires a change to the documentation, which is located at Autolab Docs
• I have updated the documentation accordingly, included in this PR

Other issues / help required

If unsure, feel free to submit first and we'll help you along.

[oliverli]

LGTM