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/e2e/suites/ha_cold/BUILD.bazel b/metropolis/test/e2e/suites/ha_cold/BUILD.bazel
index 2ace798..d3370d0 100644
--- a/metropolis/test/e2e/suites/ha_cold/BUILD.bazel
+++ b/metropolis/test/e2e/suites/ha_cold/BUILD.bazel
@@ -21,5 +21,6 @@
         "//metropolis/test/launch",
         "//metropolis/test/util",
         "//osbase/test/launch",
+        "@io_k8s_utils//ptr",
     ],
 )