Add VM infrastructure smoke test

This adds an E2E test which exercises the VM infrastructure (Kubernetes, KVM device plugin and QEMU).
This test should ensure that nobody breaks the core infrastructure Metropolis VMs rely on.

Test Plan: This is a test

X-Origin-Diff: phab/D740
GitOrigin-RevId: ddf629725dfb664ace5a50efee9ed9442962d6f7
diff --git a/metropolis/node/BUILD.bazel b/metropolis/node/BUILD.bazel
index f037cf6..b5ed532 100644
--- a/metropolis/node/BUILD.bazel
+++ b/metropolis/node/BUILD.bazel
@@ -64,6 +64,7 @@
         # Containerd preseed bundles
         "//metropolis/test/e2e/preseedtest:preseedtest.tar": "/containerd/preseed/k8s.io/preseedtest.tar",
         "//metropolis/test/e2e/k8s_cts:k8s_cts_image.tar": "/containerd/preseed/k8s.io/k8s_cts.tar",
+        "//metropolis/vm/smoketest:smoketest_container.tar": "/containerd/preseed/k8s.io/smoketest.tar",
 
         # CNI Plugins
         "@com_github_containernetworking_plugins//plugins/main/loopback": "/containerd/bin/cni/loopback",