treewide: migrate external rules to bzlmod

This is a huge one as it was very annoying to migrate them separately. This migrates rules_go, gazelle, rust_rust, protobuf to bzlmod

Change-Id: If39591d43ed4c2afa2979ee5915e9d1cfa1574a9
Reviewed-on: https://review.monogon.dev/c/monogon/+/3234
Tested-by: Jenkins CI
Reviewed-by: Leopold Schabel <leo@monogon.tech>
Reviewed-by: Lorenz Brun <lorenz@monogon.tech>
diff --git a/metropolis/proto/ext/BUILD.bazel b/metropolis/proto/ext/BUILD.bazel
index e84153b..aeb6d69 100644
--- a/metropolis/proto/ext/BUILD.bazel
+++ b/metropolis/proto/ext/BUILD.bazel
@@ -6,7 +6,7 @@
     name = "ext_proto",
     srcs = ["authorization.proto"],
     visibility = ["//visibility:public"],
-    deps = ["@com_google_protobuf//:descriptor_proto"],
+    deps = ["@protobuf//:descriptor_proto"],
 )
 
 go_proto_library(