Merge pull request #17774 from protocolbuffers/cp-rust-visibility

Cherry-pick rust visibility fix and removal of rust from BCR presubmit to 28.x

Author: zhangskz

.bcr/presubmit.yml

@@ -14,7 +14,6 @@ tasks:
     - '@protobuf//:protobuf'
     - '@protobuf//:protobuf_lite'
     - '@protobuf//:protobuf_python'
-    - '@protobuf//:protobuf_rust'
     - '@protobuf//:protoc'
     - '@protobuf//:test_messages_proto2_cc_proto'
     - '@protobuf//:test_messages_proto3_cc_proto'

rust/BUILD

@@ -6,6 +6,7 @@ load("//bazel/toolchains:proto_lang_toolchain.bzl", "proto_lang_toolchain")
 
 package(
     default_visibility = [
+        "//:__pkg__",  # "public" targets are alias rules in //.
         "//src/google/protobuf:__subpackages__",
     ],
 )