Convert Credential route tree to react-router v6 Routes

[blaipr]

SUMMARY

Continues the react-router v5 → v6 route-tree migration. Converts the Credential screen's route trees from the v5 <Switch>/<Route>/<Redirect> API to v6 <Routes>/<Route> via react-router-dom-v5-compat, following the pattern used for the earlier screen conversions.

UI (no behavior change — same URLs, same panels):

• Credentials.js (list router): <Switch> → <Routes>; child routes use the element prop; the detail route is /credentials/:id/* so the nested <Credential> tree can match the rest of the path.
• Credential.js (detail router): <Switch> → <Routes> with relative child paths (details, edit, access, job_templates); the exact <Redirect> becomes an index route that <Navigate replace>s to details; the two duplicated v5 catch-all not-found routes collapse to a single path="*" route, and the useRouteMatch({path}) match.params.id is replaced with the id route param from useParams.
• Tests: both suites rewritten with renderWithContexts (RTL) to assert real v6 route resolution — each tab panel, the kind-gated Job Templates tab, the index redirect, the unknown-sub-route not-found error, and the 404 detail error.

ISSUE TYPE

• Bug, Docs Fix or other nominal change

COMPONENT NAME

• UI

ADDITIONAL INFORMATION

• Part of the incremental react-router v6 migration; each screen's route tree is independent and converted on its own branch off main.
• Tests: 12 route-resolution tests across the two converted suites; full screens/Credential directory passes (23 suites / 121 tests).
• npm --prefix awx/ui run lint clean on the changed source.

[Copilot]

Pull request overview

Migrates the Credential screen’s routing from react-router v5 Switch/Route/Redirect to v6-style Routes/Route/Navigate via react-router-dom-v5-compat, and updates the associated UI tests to assert actual v6 route resolution.

Changes:

• Converted the Credentials list router to <Routes> and updated the detail route to /credentials/:id/* to support nested matching.
• Converted the Credential detail router to v6 nested, relative child routes with an index redirect to details.
• Rewrote the Credentials/Credential routing tests to use RTL renderWithContexts + memory history for real route resolution.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
awx/ui/src/screens/Credential/Credentials.js	Switch→Routes conversion and detail route updated to include /* for nested matching.
awx/ui/src/screens/Credential/Credential.js	Detail route tree converted to nested v6 <Routes> with relative paths and index redirect.
awx/ui/src/screens/Credential/Credentials.test.js	Converted to RTL route-resolution tests for the list/add/detail route branches.
awx/ui/src/screens/Credential/Credential.test.js	Converted to RTL tests for nested route resolution, redirect, and not-found cases.
awx/ui/src/screens/Credential/CredentialEdit/CredentialEdit.js	Aligns useParams usage with react-router-dom-v5-compat for v6 route tree.
awx/ui/src/screens/Credential/CredentialEdit/CredentialEdit.test.js	Updates router hook mocking to target react-router-dom-v5-compat.

[blaipr]

Thanks for the review. Addressed in f9b0e03690 and a6824d4acb: fixed the doubled /* /* comment and added back a ScreenHeader assertion (stream type and breadcrumb config) so the breadcrumb/title coverage the enzyme suite had is restored.