UEFI boot tests fail on Jenkins
_Originally created by @intrigeri on [#11583 (Redmine)](https://public-redmine-archive.tails.boum.org/code/issues/11583)_
Once tails/tails#10720 is workaround’ed, “Booting Tails from a USB drive in UEFI
mode” always fail with a black screen.
Feature Branch: test/11583-uefi-boot-is-fragile-stretch
Parent Task: tails/tails#10288
### Related issues
- **Related to** tails/tails#12141
- [x] **Blocked by** tails/sysadmin#11588
issue