Assessment: Fix an issue where deleting one unsaved inline feedback deletes all unsaved feedbacks

[chrisknedl]

Checklist

General

• This is a small issue that I tested locally and was confirmed by another developer on a test server.
• Language: I followed the guidelines for inclusive, diversity-sensitive, and appreciative language.
• I chose a title conforming to the naming conventions for pull requests.

Client

• I followed the coding and design guidelines.
• I added multiple integration tests (Jest) related to the features (with a high test coverage), while following the test guidelines.
• I documented the TypeScript code using JSDoc style.

Motivation and Context

Closes #7709

Description

To correctly identify the feedback that should be deleted before it has been saved for the first time, the line, file and content of the feedback are now taken into consideration in addition to the id.

Steps for Testing

Prerequisites:

• 1 Tutor/Instructor
• 1 Programming Exercise with manual assessment

1. As tutor/instructor assess a programming exercise.
2. Add a few inline comments in the code editor.
3. Delete one of those comments.
4. The other comments should still be there.

Testserver States

Note

These badges show the state of the test servers.
Green = Currently available, Red = Currently locked

Review Progress

Performance Review

• I (as a reviewer) confirm that the client changes (in particular related to REST calls and UI responsiveness) are implemented with a very good performance
• I (as a reviewer) confirm that the server changes (in particular related to database calls) are implemented with a very good performance

Code Review

• Code Review 1
• Code Review 2

Manual Tests

• Test 1
• Test 2

[bassner]

Hijacking this PR for a short test, will revert afterwards :D

[LenaKahle]

Approve, tested on legacy ts11.

[sarpsahinalp]

Tested on ts5. Worked as expected.

[georgyia]

tested manually on ts2, works as expected

[vinceclifford]

Tested on TS2, works as expected

[AntonGeTUM]

Tested on ts11, works as described

[krusche]

just waiting for the checks to pass, then I will merge this PR