b/a/noioutil: add an analyzer prohibiting use of ioutil

The ioutil package is deprecated and a tree-wide migration was already
done. This analyzer ensures that there can be no users of this package
in the future.

Change-Id: Ica6cd01ce5cb919d6f236225deeaff70b8e2800b
Reviewed-on: https://review.monogon.dev/c/monogon/+/451
Reviewed-by: Sergiusz Bazanski <serge@monogon.tech>
diff --git a/build/analysis/BUILD.bazel b/build/analysis/BUILD.bazel
index f4f3f66..938867f 100644
--- a/build/analysis/BUILD.bazel
+++ b/build/analysis/BUILD.bazel
@@ -41,5 +41,6 @@
         # 'standard' 80 characters long, as prose within comment blocks does not
         # soft-reflow well.
         "@com_github_corverroos_commentwrap//:go_default_library",
+        "//build/analysis/noioutil:go_default_library",
     ],
 )