feat: persist 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

[DanielVZ96]

@CefBoud hey, I can't find the line if (providerType !== 'openedx') {. Do you have a link to where I can find it?

[CefBoud]

@DanielVZ96 apologies. I forgot to add the link. Here it is.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.44%. Comparing base (f336daa) to head (4584d6a).
Report is 4 commits behind head on asu-moe/redwood-css.

Additional details and impacted files

@@                 Coverage Diff                  @@
##           asu-moe/redwood-css      #59   +/-   ##
====================================================
  Coverage                92.43%   92.44%           
====================================================
  Files                      708      708           
  Lines                    12539    12541    +2     
  Branches                  2690     2726   +36     
====================================================
+ Hits                     11591    11594    +3     
+ Misses                     913      912    -1     
  Partials                    35       35           

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[DanielVZ96]

👍

• I tested instructions above
• I read through the code
• I checked for accessibility issues
• Includes documentation
• Added to the Code Drift project board (for backports)

Coverage went down, so I'd prefer for you to add a test for this... but I'll leave it up to you