Feature/add search functionality for models

[wkirdp]

• Define filters for Billing Projects, Managed Groups, Workspaces and Accounts lists
• Use filters in BillingProjectList, ManagedGroupList, WorkspacesList, WorkspaceListByType, AccountList, AccountActiveList, and AccountInctiveList views.
• Add filter forms on billingproject_list, managedgroup_list, workspace_list and account_list templates
• Add tests

[codecov[bot]]

Codecov Report

Merging #393 (d29fdb4) into main (63ba24c) will increase coverage by 0.00%. Report is 2 commits behind head on main. The diff coverage is 100.00%.

@@           Coverage Diff            @@
##             main     #393    +/-   ##
========================================
  Coverage   99.82%   99.82%            
========================================
  Files         119      121     +2     
  Lines       22335    22802   +467     
========================================
+ Hits        22295    22762   +467     
  Misses         40       40            

Files	Coverage Δ
anvil_consortium_manager/__init__.py	100.00% <100.00%> (ø)
anvil_consortium_manager/adapters/account.py	100.00% <100.00%> (ø)
anvil_consortium_manager/adapters/default.py	100.00% <100.00%> (ø)
anvil_consortium_manager/filters.py	100.00% <100.00%> (ø)
anvil_consortium_manager/forms.py	100.00% <100.00%> (ø)
...mplates/anvil_consortium_manager/account_list.html	100.00% <100.00%> (ø)
.../anvil_consortium_manager/billingproject_list.html	100.00% <100.00%> (ø)
...es/anvil_consortium_manager/managedgroup_list.html	100.00% <100.00%> (ø)
...lates/anvil_consortium_manager/workspace_list.html	100.00% <100.00%> (ø)
anvil_consortium_manager/tests/test_adapters.py	100.00% <100.00%> (ø)
... and 5 more

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[amstilp]

@wkirdp I played around with the filter form to get something that is a little less intrusive. Please see the changes I made to BillingProjectFilter and the billingproject_list.html template, and make the same changes for the other filters and list templates.

[amstilp]

CI issues seem to be intermittent and solved by retrying tox runs using the retry github action. The failures happen more often when there is no cache. It does not seem to be anything in the code.