Move y2023/localizer/utils.h to frc971/vision

These are entirely year-generic, no reason to keep them year-specific.

Change-Id: Ie3636613074e21c578afe0c9f136f6553759b63c
Signed-off-by: James Kuszmaul <jabukuszmaul+collab@gmail.com>
diff --git a/frc971/vision/BUILD b/frc971/vision/BUILD
index 02ab5e2..d96822b 100644
--- a/frc971/vision/BUILD
+++ b/frc971/vision/BUILD
@@ -386,3 +386,14 @@
         "@com_github_google_glog//:glog",
     ],
 )
+
+cc_library(
+    name = "target_map_utils",
+    srcs = ["target_map_utils.cc"],
+    hdrs = ["target_map_utils.h"],
+    visibility = ["//visibility:public"],
+    deps = [
+        "//frc971/vision:target_map_fbs",
+        "@org_tuxfamily_eigen//:eigen",
+    ],
+)