Remove collaboration module.

[jkmarx]

Ref #2680

• Remove collaboration module and page
• Remove front end collaboration references (tutorial)
• Leaving the tutorial backend model until we decide how we want to handle the new dashboard's tutorials

[codecov]

Codecov Report

Merging #3103 into develop will increase coverage by 0.35%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #3103      +/-   ##
===========================================
+ Coverage    60.62%   60.98%   +0.35%     
===========================================
  Files          431      421      -10     
  Lines        28005    27367     -638     
  Branches      1300     1264      -36     
===========================================
- Hits         16978    16689     -289     
+ Misses       11027    10678     -349

Impacted Files	Coverage Δ
refinery/ui/source/js/refinery.js	100% <ø> (ø)	⬆️
...ui/source/js/commons/ctrls/group-add-modal-ctrl.js	51.72% <ø> (-3.28%)	⬇️
refinery/ui/source/js/refinery-controller.js	7.89% <ø> (-2.75%)	⬇️
refinery/core/urls.py	100% <ø> (ø)	⬆️
...e/js/commons/ctrls/group-member-edit-modal-ctrl.js	43.63% <ø> (+0.77%)	⬆️
...ce/js/commons/ctrls/group-member-add-modal-ctrl.js	58.33% <ø> (-1.29%)	⬇️
refinery/core/views.py	47.61% <ø> (-3.51%)	⬇️
...commons/directives/sharing-help-popover-details.js	100% <ø> (ø)	⬆️
... and 6 more

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[scottx611x]

There are still some artifacts related to the collaboration tutorials (See: collaboration_tutorial_viewed), but from what I remember in the meeting from yesterday there's going to be an overhaul of the existing tutorials anyways, correct? So this much is probably fine.

[jkmarx]

@scottx611x Ref #3109