chore: Add credentials: omit when calling into /incident API endpoints

[everettbu]

Mirror of supabase/supabase#43777
Original author: ivasilov

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/incident-status and /incident-banner are not cached because they include auth cookies which busts Vercel cache. This PR add credentials: omit since they calls don't need auth cookies and they're same for all users.

[blacksmith-sh]

Found 7 test failures on Blacksmith runners:

Failures

Test	View Logs
[Features] › features/ realtime-inspector.spec.ts:115:5 › Realtime Inspector › Broadcast Messages › broadcast modal validates JSON payload	View Logs
Realtime Inspector › Broadcast Messages/broadcast modal validates JSON payload	View Logs
Realtime Inspector › Broadcast Messages/ broadcast modal validates JSON payload (retry #1)	View Logs
Realtime Inspector › Broadcast Messages/ broadcast modal validates JSON payload (retry #2)	View Logs
Realtime Inspector › Broadcast Messages/ broadcast modal validates JSON payload (retry #3)	View Logs
Realtime Inspector › Broadcast Messages/ broadcast modal validates JSON payload (retry #4)	View Logs
Realtime Inspector › Broadcast Messages/ broadcast modal validates JSON payload (retry #5)	View Logs

[github-actions]

🎭 Playwright Test Results

 1 failed
 155 passed
 5 skipped

Details

 161 tests across 20 suites
 2 minutes, 19 seconds
 1382423

Failed tests

Features › realtime-inspector.spec.ts › Realtime Inspector › Broadcast Messages › broadcast modal validates JSON payload

Skipped tests

Features › assistant.spec.ts › AI Assistant › Can send a message to the assistant and receive a response
Features › sql-editor.spec.ts › SQL Editor › snippet favourite works as expected
Features › sql-editor.spec.ts › SQL Editor › share with team works as expected
Features › sql-editor.spec.ts › SQL Editor › folders works as expected
Features › sql-editor.spec.ts › SQL Editor › other SQL snippets actions work as expected

[everettbu]

Upstream PR was closed or merged. Code is synced via branch mirror.