E2E test: download a torrent with a personal announce URL

[josecelano]

Parent issue: https://github.com/torrust/torrust-index-frontend/issues/148 Relates to:

• https://github.com/torrust/torrust-index-gui/issues/412
• https://github.com/torrust/torrust-index-gui/issues/412#issuecomment-1866890915

When the user is logged in and downloads a torrent, the announce URL should have the user's tracker key.

We should first define what it's the right behavior and if we need to change the actual behavior. See https://github.com/torrust/torrust-index-gui/issues/412#issuecomment-1866890915