m/n/c/mgmt: disable interfaces before kexec

This is done to prevent network interface DMA transactions from
interfering with an in-progress kexec. [1]

[1] https://lists.infradead.org/pipermail/kexec/2011-January/004795.html

Change-Id: I12ab22c095fcff56873d980d524c461b1b2d57ee
Reviewed-on: https://review.monogon.dev/c/monogon/+/2783
Reviewed-by: Tim Windelschmidt <tim@monogon.tech>
Tested-by: Jenkins CI
diff --git a/metropolis/node/core/mgmt/BUILD.bazel b/metropolis/node/core/mgmt/BUILD.bazel
index e683eee..a274013 100644
--- a/metropolis/node/core/mgmt/BUILD.bazel
+++ b/metropolis/node/core/mgmt/BUILD.bazel
@@ -18,6 +18,7 @@
         "//metropolis/pkg/supervisor",
         "//metropolis/proto/api",
         "//metropolis/proto/common",
+        "@com_github_vishvananda_netlink//:netlink",
         "@org_golang_google_grpc//:go_default_library",
         "@org_golang_google_grpc//codes",
         "@org_golang_google_grpc//status",