fix: update change request after create

[kyle-ssg]

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Changes

The frontend was unnecessarily updating change requests after creation, this was only needed for MV features. In addition the payload was also incorrect as it didn't include the ids of changesets

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Name	Status	Preview	Comments	Updated (UTC)
flagsmith-frontend-preview	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 28, 2024 4:58pm
flagsmith-frontend-staging	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 28, 2024 4:58pm

1 Skipped Deployment

Name	Status	Preview	Comments	Updated (UTC)
docs	⬜️ Ignored (Inspect)			Aug 28, 2024 4:58pm

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-api-test:pr-4551	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-e2e:pr-4551	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api:pr-4551	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-4551	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-4551	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-frontend:pr-4551	Finished ✅	Results ✅

[github-actions]

Uffizzi Preview deployment-55657 was deleted.

[matthewelwell]

Fixes #4536

[matthewelwell]

In testing this, I've created #4588 but I think it's unrelated to this issue as I can reproduce it in current production when change requests and versioning is enabled.