feat(ui): Add pagination and search support to role selector

[pedro93]

Summary

• Add useRoleSelector hook with pagination (infinite scroll) and search capability for role dropdowns
• Migrate UserList, GroupList, and ViewInviteTokenModal to use the new centralized hook
• Remove dead code from ViewInviteTokenModal (unused location/query parsing)
• Add comprehensive tests for useRoleSelector hook

This addresses scalability issues when organizations have many roles (>10), where the previous implementation only fetched the first 10 roles.

Test plan

• Verify role dropdown shows all roles with infinite scroll
• Verify search filters roles correctly
• Verify role selection works in user list, group list, and invite modal
• Run tests: yarn test src/app/identity/user/__tests__/useRoleSelector.test.ts --run
• Run type-check: yarn type-check
• Run lint on all changed files

[alwaysmeticulous]

✅ Meticulous spotted 0 visual differences across 952 screens tested: view results.

Meticulous evaluated ~8 hours of user flows against your PR.

_{Expected differences? Click here. Last updated for commit 54a1dbd. This comment will update as new commits are pushed.}

[codecov]

Codecov Report

❌ Patch coverage is 86.20690% with 12 lines in your changes missing coverage. Please review.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...web-react/src/app/identity/user/useRoleSelector.ts	86.20%	12 Missing ⚠️

📢 Thoughts on this report? Let us know!

[codecov]

Bundle Report

Changes will increase total bundle size by 2.21kB (0.01%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
datahub-react-web-esm	29.45MB	2.21kB (0.01%) ⬆️

Affected Assets, Files, and Routes:

view changes for bundle: datahub-react-web-esm

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
assets/index-*.js	2.21kB	19.28MB	0.01%

Files in assets/index-*.js:

• ./src/app/identity/user/ViewInviteTokenModal.tsx → Total Size: 5.83kB

• ./src/app/identity/group/GroupListItem.tsx → Total Size: 3.15kB

• ./src/app/identity/group/SelectRoleGroup.tsx → Total Size: 3.53kB

• ./src/app/identity/user/SelectRole.tsx → Total Size: 3.48kB

• ./src/app/identity/user/UserList.tsx → Total Size: 5.01kB

• ./src/app/identity/group/GroupList.tsx → Total Size: 4.26kB

• ./src/app/identity/user/useRoleSelector.ts → Total Size: 2.41kB

• ./src/app/identity/user/UserListItem.tsx → Total Size: 5.0kB