Data Transfer does not use built in proxy configuration
### Node Version

20.x.x

### NPM/Yarn/PNPM Version

Yarn 1

### Strapi Version

5.x.x + 4.x.x

### Operating System

Linux (Debian/Ubuntu)

### Database

PostgreSQL

### Javascript or Typescript

Javascript

### Reproduction URL

_No response_

### Bug Description

When using the DIETS/DTS the built in proxy config on both Strapi 4 and Strapi 5 do not work meaning that in certain closed network environments where a forward proxy is required to access the external network (IE fetching files from remote providers or transferring to an application outside the corporate network) will not function.

### Steps to Reproduce

Reproducing this requires usage of a forward proxy such as [Squid](https://www.squid-cache.org/)

1. Configure a local squid proxy
2. Configure Strapi's built in proxy to use Squid
3. Configure an external provider or attempt to transfer to a remote system not on your local network
4. Check Squid logs
5. See that all HTTP requests made by DIETS/DTS is not using the proxy

### Expected Behavior

All internal HTTP requests outside of the application should use the proxy if it's configured

### Logs

```shell
N/A
```

### Code Snippets

N/A

### Media

N/A

### Additional information

Related to TID10937

### Confirmation Checklist

- [x] I have checked the existing [issues](https://github.com/strapi/strapi/issues) for duplicates.
- [x] I agree to follow this project's [Code of Conduct](https://github.com/strapi/strapi/blob/develop/CODE_OF_CONDUCT.md).