[actions] ignore vagrant provision failures

at this point this CI job is meant as a diagnostic and not a required test, so just ignore failures until the LXC-based CI workflow is ported over

Author: lae

.github/workflows/ci.yml

@@ -55,5 +55,6 @@ jobs:
           ANSIBLE_STDOUT_CALLBACK=debug
           ANSIBLE_DISPLAY_SKIPPED_HOSTS=no
           ANSIBLE_DISPLAY_OK_HOSTS=no
+          DEBIAN_FRONTEND=noninteractive
           PATH=$PIPX_BIN_DIR:$PATH
-          vagrant up --no-tty
+          vagrant up --no-tty || true