linux-builder: Add ephemeral option to delete VM's disk image on service restart
#1210
tfctest.yml
on: pull_request
test-stable
7m 35s
test-unstable
11m 39s
install-against-stable
3m 8s
install-against-unstable
5m 57s
install-flake-against-stable
3m 35s
install-flake-against-unstable
5m 15s