[Bug]: amddevcloud does not work due to API url change

[r4victor]

Steps to reproduce

1. Configure an amddevcloud backend
2. Try to get offers and you'll get an error

                    requests.exceptions.HTTPError: 401 Client Error: Unauthorized for url:
                    https://api.devcloud.amd.com/v2/sizes?per_page=500

Actual behaviour

1. api-amd.digitalocean.com now 301-redirects to api.devcloud.amd.com.
2. requests follows the redirect, but Session.rebuild_auth() deletes the Authorization header whenever the redirect crosses to a different host (should_strip_auth). digitalocean.com → amd.com is a different host, so the Bearer token is dropped and AMD's API answers 401.

So the backend is now broken for all current dstack installations.

Expected behaviour

No response

dstack version

master

Server logs

Additional information

No response