Resolve "Notification asking students for feedback"

What does this mr do?

Send the students a notification when their request is approved to ask them for some feedback.

Screenshots

before

after

Does this MR meet the acceptance criteria?

• I have added a changelog entry to reflect the significant changes I made.
• Tests were created to test the feature.
• I have updated the documentation accordingly.
• I adhere to the style guide.

Closes #242 (closed)

Redo from !174 (closed)