chore!: simplify api handler (#6910)

Removes PayloadRequestWithData in favour of just PayloadRequest with
optional types for `data` and `locale`

`addDataAndFileToRequest` and `addLocalesToRequestFromData` now takes in
a single argument instead of an object

```ts
// before
await addDataAndFileToRequest({ request: req })
addLocalesToRequestFromData({ request: req })

// current
await addDataAndFileToRequest(req)
addLocalesToRequestFromData(req)
```

---------

Co-authored-by: Paul Popus <paul@nouance.io>

packages/next/src/utilities/initPage/index.ts

@@ -1,5 +1,5 @@
 import type { I18nClient } from '@payloadcms/translations'
-import type { InitPageResult, Locale, PayloadRequestWithData, VisibleEntities } from 'payload'
+import type { InitPageResult, Locale, PayloadRequest, VisibleEntities } from 'payload'
 
 import { initI18n } from '@payloadcms/translations'
 import { findLocaleFromCode } from '@payloadcms/ui/shared'
@@ -66,7 +66,7 @@ export const initPage = async ({
           ignoreQueryPrefix: true,
         }),
         url: `${payload.config.serverURL}${route}${searchParams ? queryString : ''}`,
-      } as PayloadRequestWithData,
+      } as PayloadRequest,
     },
     payload,
   )