fix: adds check for isMarketableExternal to course run filter

[brobro10000]

Adds a check to the isMarketableExternal flag to the standardAvailableCourseRunsFilter

For all changes

• Ensure adequate tests are in place (or reviewed existing tests cover changes)
• Ensure English strings are marked for translation. See documentation for more details.

Only if submitting a visual change

• Ensure to attach screenshots
• Ensure to have UX team confirm screenshots

[pwnage101]

Add test cases to this maybe?

frontend-app-learner-portal-enterprise/src/components/app/data/utils.test.js

Line 499 in f62618a

const sampleCourseRunData = {

[pwnage101]

Otherwise LGTM - only non-blocking suggestion to add test cases.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.47%. Comparing base (f62618a) to head (a838df7).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1264   +/-   ##
=======================================
  Coverage   89.47%   89.47%           
=======================================
  Files         404      404           
  Lines        8741     8741           
  Branches     2069     2117   +48     
=======================================
  Hits         7821     7821           
+ Misses        884      883    -1     
- Partials       36       37    +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.