fix: no validation for combined length of org, course number and course run for Redwood

[DmytroAlipov]

This is a backport from the master.

Description

There's no validation for combined length of organization, course number and course run:

For legacy:

---

Fix:

[openedx-webhooks]

Thanks for the pull request, @DmytroAlipov!

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (open-release/redwood.master@8518933). Learn more about missing BASE report.

Additional details and impacted files

@@                      Coverage Diff                       @@
##             open-release/redwood.master    #1261   +/-   ##
==============================================================
  Coverage                               ?   92.32%           
==============================================================
  Files                                  ?      708           
  Lines                                  ?    12553           
  Branches                               ?     2695           
==============================================================
  Hits                                   ?    11590           
  Misses                                 ?      926           
  Partials                               ?       37           

☔ View full report in Codecov by Sentry.
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[DmytroAlipov]

@pomegranited @KristinAoki Hi! Could you please pay attention to this PR? I would like this fix to be included in the Redwood.3 release since this validation seems necessary. They completely forgot about it when they transferred logic to MFE.

[DmytroAlipov]

I'm already working on a fix for the master.

[pomegranited]

Hi @DmytroAlipov , thank you for submitting this fix. I'd love to help but I'm not a CC on this repo, so FYI @openedx/2u-tnl @mphilbrick211