metropolis/test/util: move TestCurator to utils package

To use it inside other tests this change moves the TestCurator
to allow usage inside other tests

Change-Id: I75be31f490eb84e5c9bc56b65317ea5483415dcf
Reviewed-on: https://review.monogon.dev/c/monogon/+/1954
Reviewed-by: Serge Bazanski <serge@monogon.tech>
Tested-by: Jenkins CI
diff --git a/metropolis/node/core/clusternet/BUILD.bazel b/metropolis/node/core/clusternet/BUILD.bazel
index 35e6903..a5fc41a 100644
--- a/metropolis/node/core/clusternet/BUILD.bazel
+++ b/metropolis/node/core/clusternet/BUILD.bazel
@@ -41,11 +41,9 @@
         "//metropolis/pkg/event/memory",
         "//metropolis/pkg/supervisor",
         "//metropolis/proto/common",
+        "//metropolis/test/util",
         "@com_zx2c4_golang_wireguard_wgctrl//:wgctrl",
         "@com_zx2c4_golang_wireguard_wgctrl//wgtypes",
-        "@org_golang_google_grpc//:go_default_library",
-        "@org_golang_google_grpc//credentials/insecure",
-        "@org_golang_google_grpc//test/bufconn",
     ],
 )