feat: combine value + segment change requests for versioned environments

[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

This allows segment and environment changes to be created under 1 change requests for versioned environments.

How did you test this code?

Created change requests changing both the value and the segment overrides and individually.

[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	Dec 3, 2024 11:35am
flagsmith-frontend-staging	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Dec 3, 2024 11:35am

1 Skipped Deployment

Name	Status	Preview	Comments	Updated (UTC)
docs	⬜️ Ignored (Inspect)	Visit Preview		Dec 3, 2024 11:35am

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-api-test:pr-4738	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-e2e:pr-4738	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api:pr-4738	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-4738	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-4738	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-frontend:pr-4738	Finished ✅	Results ✅

[github-actions]

Uffizzi Preview deployment-58628 was deleted.

[matthewelwell]

Manual testing shows that this works as expected. Add one minor comment.