ubuntu: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 2448 (unattended-upgr)

[jschwe]

Probably we should disable unattended upgrade in the ci-runner image.

Run sudo apt-get install -y lld
E: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 2448 (unattended-upgr)
E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?
Error: Process completed with exit code 100.

Run: https://github.com/servo/servo/actions/runs/18621788692/job/53093904667