treewide: add more ptr.To usages

Change-Id: Ibf511bc012a17e39d6b7b4f3a7d9abc1304d755f
Reviewed-on: https://review.monogon.dev/c/monogon/+/3677
Tested-by: Jenkins CI
Reviewed-by: Tim Windelschmidt <tim@monogon.tech>
diff --git a/metropolis/test/launch/BUILD.bazel b/metropolis/test/launch/BUILD.bazel
index 50f0ede..fca8bbf 100644
--- a/metropolis/test/launch/BUILD.bazel
+++ b/metropolis/test/launch/BUILD.bazel
@@ -56,6 +56,7 @@
         "@io_bazel_rules_go//go/runfiles:go_default_library",
         "@io_k8s_client_go//kubernetes",
         "@io_k8s_client_go//rest",
+        "@io_k8s_utils//ptr",
         "@org_golang_google_grpc//:grpc",
         "@org_golang_google_grpc//codes",
         "@org_golang_google_grpc//status",