[wip] upgrade Hyrax, add Valkyrie-based Resources for works

[rococodogs]

okay wow this really blew up:

• upgrades aplenty: hyrax -> 4, rails -> 6, ruby -> 3 (and the resulting cascade of dependency updates including bootstrap -> 4)
• adds valkyrie-based Resources for Curation Concern worktypes (Publication, Image, StudentWork, AudioVisual) and updates existing code to use newer Hyrax conventions.

currently still wip as the view partials all need to be updated for bootstrap 4.

[rococodogs]

commenting for posterity: the tests all pass for me locally, github has been v. finicky with this pr

[codecov]

Codecov Report

Attention: Patch coverage is 94.00000% with 36 lines in your changes missing coverage. Please review.

Project coverage is 98.24%. Comparing base (a27748b) to head (c46abbd).
Report is 3 commits behind head on develop.

Files with missing lines	Patch %	Lines
...orms/concerns/spot/forms/identifier_form_fields.rb	68.96%	9 Missing ⚠️
...orms/batch_edit_form_terms_and_permitted_params.rb	50.00%	5 Missing ⚠️
...ollections_dashboard_controller_facets_behavior.rb	66.66%	3 Missing ⚠️
...orms/concerns/spot/forms/resource_form_behavior.rb	75.00%	2 Missing ⚠️
app/forms/student_work_resource_form.rb	92.00%	2 Missing ⚠️
app/indexers/base_indexer.rb	81.81%	2 Missing ⚠️
app/services/spot/embargo_lease_service.rb	90.90%	2 Missing ⚠️
app/services/spot/work_form_service.rb	66.66%	2 Missing ⚠️
...concerns/spot/qa_assign_fast_subauthority_patch.rb	87.50%	1 Missing ⚠️
app/controllers/concerns/spot/one_column_layout.rb	80.00%	1 Missing ⚠️
... and 7 more

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1132      +/-   ##
===========================================
- Coverage    98.75%   98.24%   -0.51%     
===========================================
  Files          192      225      +33     
  Lines         3364     3812     +448     
===========================================
+ Hits          3322     3745     +423     
- Misses          42       67      +25     

Files with missing lines	Coverage Δ
app/actors/concerns/deserializes_rdf_literals.rb	100.00% <100.00%> (ø)
app/actors/solr_suggest_actor.rb	100.00% <ø> (ø)
...actors/spot/actors/collections_membership_actor.rb	100.00% <ø> (ø)
...rns/spot/qa_assign_fast_generic_authority_patch.rb	100.00% <100.00%> (ø)
app/controllers/application_controller.rb	92.85% <ø> (-0.25%)	⬇️
app/controllers/catalog_controller.rb	100.00% <100.00%> (ø)
...ollers/concerns/spot/cas_entitlement_patch_rack.rb	100.00% <100.00%> (ø)
...ers/concerns/spot/downloads_controller_behavior.rb	100.00% <100.00%> (ø)
...rollers/concerns/spot/works_controller_behavior.rb	100.00% <100.00%> (+15.78%)	⬆️
app/controllers/handle_controller.rb	100.00% <100.00%> (+6.25%)	⬆️
... and 82 more

... and 3 files with indirect coverage changes

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[rococodogs]

ok after going through every ENV possibility, i think the create_*_specs are failing because of something to do with the VALKYRIE_SOLR_CORE variable? it's working with the development core but not the test one?