teams: fix judging form save

Tianyi LIANGrequested to merge
fix/judging-form-fail-to-save into main
  • fix judging form save (not sure which Jira task it belongs to)
  • remove promo-video from judging form display page
  • after the form is submitted, it will remain on the current page and display 403, which may cause ambiguity. now, redirect back to view form
Edited by Tianyi LIANG

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