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>

test/relationships/int.spec.ts

@@ -1,4 +1,4 @@
-import type { Payload, PayloadRequestWithData } from 'payload'
+import type { Payload, PayloadRequest } from 'payload'
 
 import { randomBytes } from 'crypto'
 
@@ -895,7 +895,7 @@ describe('Relationships', () => {
   describe('Creating', () => {
     describe('With transactions', () => {
       it('should be able to create filtered relations within a transaction', async () => {
-        const req = {} as PayloadRequestWithData
+        const req = {} as PayloadRequest
         req.transactionID = await payload.db.beginTransaction?.()
         const related = await payload.create({
           collection: relationSlug,