chore: make experimental images options optional (#38030)

this makes all `experimental.images` options optional, so they can be toggled individually.

## Bug

- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Errors have helpful link attached, see `contributing.md`

## Feature

- [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have helpful link attached, see `contributing.md`

## Documentation / Examples

- [ ] Make sure the linting passes by running `pnpm lint`
- [ ] The examples guidelines are followed from [our contributing doc](https://github.com/vercel/next.js/blob/canary/contributing.md#adding-examples)

packages/next/server/config-shared.ts

@@ -118,8 +118,8 @@ export interface ExperimentalConfig {
   urlImports?: NonNullable<webpack5.Configuration['experiments']>['buildHttp']
   outputFileTracingRoot?: string
   images?: {
-    layoutRaw: boolean
-    remotePatterns: RemotePattern[]
+    layoutRaw?: boolean
+    remotePatterns?: RemotePattern[]
     unoptimized?: boolean
     allowFutureImage?: boolean
   }