E2E tests: generate magnet link (on list page)

Parent issue: https://github.com/torrust/torrust-index-frontend/issues/148
Relates to: https://github.com/torrust/torrust-index-frontend/issues/230

E2E test for generating the magnet link. See issue #230.

![image](https://github.com/torrust/torrust-index-frontend/assets/58816/5d6c8cdb-4b5f-4d1a-92c4-6ebf4fe1ff9b)