fix: integrations page permission

[kyle-ssg]

Thanks for submitting a PR! Please check the boxes below:

• I have added information to docs/ if required so people know about the feature!
• I have filled in the "Changes" section below?
• I have filled in the "How did you test this code" section below?
• I have used a Conventional Commit title for this Pull Request

Changes

• The integrations page was using an incorrect permissions check
• Replaces page with RTK

How did you test this code?

Opened existing integrations / checked same data was all there

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Name	Status	Preview	Comments	Updated (UTC)
flagsmith-frontend-preview	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jan 27, 2025 3:03pm
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1 Skipped Deployment

Name	Status	Preview	Comments	Updated (UTC)
docs	⬜️ Ignored (Inspect)			Jan 27, 2025 3:03pm

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-e2e:pr-5042	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api-test:pr-5042	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api:pr-5042	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-5042	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-5042	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-frontend:pr-5042	Finished ✅	Results ✅

[github-actions]

Uffizzi Preview deployment-60319 was deleted.