feat: save discussion alert dismissal

[CefBoud]

Description

The alert used to inform about the usage of an upgraded version of discussion forum still shows on refresh after being dismissed. The goal of this PR is correct that and save the dismissal per course.

Testing instruction

• Clone this repository and run npm insall
• Ensure your are running Tutor redwood locally (>= 18)
• Mount the clone repository to Tutor using tutor mounts add your/path/to/frontend-app-course-authoring
• Run tutor dev launch
• To simplify testing and show the Alert, comment out the following or set the condition to be always false.

if (providerType !== 'openedx') {
     return null;
   }

• Dismiss the Alert then refresh. The alert will show again
• Checkout this PR's branch then run npm install
• Now after dismissal and refresh, the alert shouldn't show.

ref

BB-9079

[openedx-webhooks]

Thanks for the pull request, @CefBoud!

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[KristinAoki]

@CefBoud can you check out the failing test? It does not appear to be connected to your changes so this branch may need to be updated with the main branch.

[bradenmacdonald]

That test in LibraryAuthoringPage.test.tsx has been flaky. I have completely refactored it, but it still may be flaky. If you see it failing again after rebasing, please let me know and I'll disable it until we get to the root cause. For now I think rebasing should work.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.31%. Comparing base (fd48fef) to head (11799cf).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1245   +/-   ##
=======================================
  Coverage   92.31%   92.31%           
=======================================
  Files        1013     1013           
  Lines       18733    18735    +2     
  Branches     3947     4008   +61     
=======================================
+ Hits        17293    17296    +3     
+ Misses       1374     1370    -4     
- Partials       66       69    +3     

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