Fixes https://github.com/payloadcms/payload/issues/11473
Previously, when `disablePayloadAccessControl: true` was defined, client
uploads were working improperly. The reason is that
`addDataAndFileToRequest` expects `staticHandler` to be defined and we
don't add in case if `disablePayloadAccessControl: true`.
This PR makes it so otherwise and if we have `clientUploads`, it pushes
the "proxied" handler that responses only when the file was requested in
the context of client upload (from `addDataAndFileToRequest`)
5cc0e74471