Merge `whitenoise` (or similar functionality) into Django

### Code of Conduct

- [x] I agree to follow Django's Code of Conduct

### Package Information

whitenoise

### Problem

I have found https://whitenoise.readthedocs.io to be an indispensable addition to any Django app that I launch -- at its core it sets the correct headers for static files so that browsers will compress/cache them correctly. It also leverages browser web standards to reduce the amount of load that hits a Django app -- paired with a CDN, it allows Django apps to scale and serve much more traffic.

### Rationale

It seems like any web application that serves static assets, i.e. the majority of web apps, could benefit from these headers being set correctly. It would provide a better deployment story for Django. Including this in core means official Django tutorials can improve the guidance around "how to deploy Django apps".

### Additional Details

- The [repo](https://github.com/evansd/whitenoise) has 2.7k stars on GitHub, so it seems pretty popular
- up to 300k downloads of the library from PyPI per day

### Implementation Details

Personally, I am not convinced that all of `whitenoise` needs to be included in Django core. Maybe there is just some core functionality that makes sense to include, but the more fiddly bits can stay in `whitenoise` for devs who might need additional features?