web: migrate remaining view pages to modalInvoker

[GirlBossRush]

Follow-up to #21336 and #21588 — migrates the remaining view/detail pages still using ak-forms-modal to the modalInvoker directive.

Summary

• Migrate edit buttons on device, flow, group, role, provider (OAuth2, SSF), and source (LDAP, OAuth) view pages to modalInvoker
• Migrate RelatedGroupList toolbar and row actions (add to group, create group, edit group)
• Add verboseName static properties to EndpointDeviceForm, BaseSourceForm, and RelatedGroupAdd
• Improve accessibility labels on user list page
• Add e2e tests for edit flows on role and group view pages, and the related group list modal

Test plan

• Edit buttons on all migrated view pages open the correct dialog with pre-filled data
• RelatedGroupList "Add to existing group", "Add new group", and row edit all open correctly
• New e2e tests pass: role view page edit, group view page edit, related group list add

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.22%. Comparing base (fc4f856) to head (4e4b102).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@                  Coverage Diff                  @@
##           modal-revisions-4   #21592      +/-   ##
=====================================================
+ Coverage              92.18%   92.22%   +0.04%     
=====================================================
  Files                   1032     1032              
  Lines                  59660    59660              
  Branches                2537     2537              
=====================================================
+ Hits                   54996    55024      +28     
+ Misses                  4601     4573      -28     
  Partials                  63       63              

Flag	Coverage Δ
conformance	37.03% <ø> (ø)
e2e	42.95% <ø> (+0.25%)	⬆️
integration	33.44% <ø> (-0.52%)	⬇️
rust	60.58% <ø> (ø)
unit	91.89% <ø> (+<0.01%)	⬆️
unit-migrate	91.99% <ø> (+<0.01%)	⬆️

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