fix: ensure run-based assignments are taken into account on course page redirect

[adamstankiewicz]

When a learner only has an assignment available, there is logic on the course about page that checks whether or not the learner only has an allocated assignment (i.e., no other subsidies available). If the learner is assignment-only and the course is not assigned, we redirect back to the dashboard.

In the case of a run-based assignment, we were missing a check for assignment-only learners against both the assignment.contentKey vs. assignment.parentContentKey when comparing to the top-level course key in the course page route URL.

With fix

Screen.Recording.2024-09-18.at.2.17.51.PM.mov

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.42%. Comparing base (5bca07b) to head (8b107ac).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1196      +/-   ##
==========================================
+ Coverage   88.41%   88.42%   +0.01%     
==========================================
  Files         396      396              
  Lines        8408     8407       -1     
  Branches     2065     2061       -4     
==========================================
  Hits         7434     7434              
+ Misses        931      930       -1     
  Partials       43       43              

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