Run the test suite automatically on autobuilt ISOs

Originally created by Tails on #5288 (Redmine)

Running the test suite automatically on the ISO built by autobuild would improve the quality of our development branches and overall robustness.

Subtasks

• tails/sysadmin#6564
• #6565 (closed)
• tails/tails#7631
• tails/tails#8667
• tails/sysadmin#9486
• tails/tails#9597
• tails/sysadmin#9645
• tails/tails#10117
• tails/tails#10118
• tails/tails#10119
• #10158 (closed)
• tails/tails#10229
• #10287 (closed)
• tails/tails#10296
• #10382 (closed)
• tails/sysadmin#10396
• #10409 (closed)
• tails/tails#10445
• tails/tails#10507
• tails/sysadmin#10601
• tails/tails#10717
• tails/tails#10725
• tails/tails#10863
• tails/tails#10993

Related issues

• Related to tails/sysadmin#6090
• Blocked by tails/tails#7060
• Blocked by tails/tails#8539