fix: Combine segment override and value change requests

[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

Fixes an invalid response from associated segment overrides

How did you test this code?

Manually checked that a null value for segment overrides does not cause the error when it previously did

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-api-test:pr-4734	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-e2e:pr-4734	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api:pr-4734	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-4734	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-4734	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-frontend:pr-4734	Finished ✅	Results ✅

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
flagsmith-frontend-preview	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Oct 16, 2024 10:23am
flagsmith-frontend-staging	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Oct 16, 2024 10:23am

1 Skipped Deployment

Name	Status	Preview	Comments	Updated (UTC)
docs	⬜️ Ignored (Inspect)			Oct 16, 2024 10:23am

[github-actions]

Uffizzi Ephemeral Environment deployment-57305

☁️ https://app.uffizzi.com/github.com/Flagsmith/flagsmith/pull/4734

📄 View Application Logs etc.

What is Uffizzi? Learn more!

[github-actions]

Uffizzi Preview deployment-57305 was deleted.