BUG: Whiteboard links broken

[SimoneZaza]

Describe the bug
Old links to single whiteboards with the format calloutname/whiteboards/whiteboard are broken

• E.g. my browser suggests: https://alkem.io/studiosimone/challenges/simonesimone/collaboration/schedule/whiteboards/whiteboard
  But when I click on it, I get a page-not-found. If I remove the "whiteboards/" the link does work.
  • So this should be https://alkem.io/studiosimone/challenges/simonesimone/collaboration/schedule/whiteboard
• Another example, we had this link pasted in one of our product issues:
  https://alkem.io/building-alkemio-org/challenges/improvingtheusere-6400/collaboration/workingonalkemioasanorgan/whiteboards/whiteboard
  • Which should be: https://alkem.io/building-alkemio-org/challenges/improvingtheusere-6400/collaboration/workingonalkemioasanorgan/whiteboard

Please note that for whiteboards inside a call for whiteboards, this structure is still correct. E.g. https://alkem.io/building-alkemio-org/challenges/product/opportunities/sprints/collaboration/reviewwhiteboards/whiteboards/whiteboard should not be redirected to https://alkem.io/building-alkemio-org/challenges/product/opportunities/sprints/collaboration/reviewwhiteboards/whiteboard

To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
Old links to single whiteboards to still be working

Additional context
Add any other context about the problem here.

Areas that will be affected as part of the fix
Optional, to be added by developer if relevant

[techsmyth]

@ccanos low risk change, affecting URLs that may have been cached. Also problably what we want. Can you please discuss with Svetlo re making a patch to prod for this?