DELETE redirect not supported [urllib.request]

Bug description:

Compare node.js:

> response = await fetch('http://www.xlog.ch/echo/delete?foo1=bar1&foo2=bar2',
...  {method:'DELETE'}); response.url
'https://www.xlog.ch/echo/delete?foo1=bar1&foo2=bar2'

With CPython:

request = urllib.request.Request('http://www.xlog.ch/echo/delete?foo1=bar1&foo2=bar2', method='DELETE')
response = urllib.request.urlopen(request)
urllib.error.HTTPError: HTTP Error 302:

I believe node.js fetch() redirects, whereas CPython thinks
302 is an error, since the method is neither HEAD, GET or PUT.

But its probably not an error, all methods are allowed:

https://developer.mozilla.org/en-US/docs/Web/HTTP/Redirections

Start with urllib.request and trace how an HTTP 302 response is handled for methods other than HEAD, GET, and PUT. Compare that path with the documented redirect behavior and the provided DELETE example; done means the intended DELETE redirect behavior is covered by a regression test without breaking existing redirect handling.