linux-builder: Add ephemeral option to delete VM's disk image on service restart
#1215
tfctest.yml
on: pull_request
test-stable
4m 22s
test-unstable
10m 49s
install-against-stable
2m 59s
install-against-unstable
4m 56s
install-flake-against-stable
3m 57s
install-flake-against-unstable
2m 50s