treewide: replace bool-to-boolptr helpers with k8s.io/utils/ptr.To

Change-Id: I90419ddfe087291f41f7f2f3589263e56c15470a
Reviewed-on: https://review.monogon.dev/c/monogon/+/3675
Tested-by: Jenkins CI
Reviewed-by: Lorenz Brun <lorenz@monogon.tech>
diff --git a/metropolis/cli/metroctl/BUILD.bazel b/metropolis/cli/metroctl/BUILD.bazel
index 10aaa9c..43805df 100644
--- a/metropolis/cli/metroctl/BUILD.bazel
+++ b/metropolis/cli/metroctl/BUILD.bazel
@@ -59,6 +59,7 @@
         "@io_bazel_rules_go//go/runfiles:go_default_library",
         "@io_k8s_apimachinery//pkg/apis/meta/v1:meta",
         "@io_k8s_client_go//pkg/apis/clientauthentication/v1:clientauthentication",
+        "@io_k8s_utils//ptr",
         "@org_golang_google_grpc//:grpc",
         "@org_golang_google_protobuf//proto",
         "@org_golang_google_protobuf//types/known/fieldmaskpb",