Dependency: remove golang/protobuf, update rules_go (#6946)

Removes golang/protobuf dependency. This is an old @sesmith177 TODO and now the version of rules_go we import has the requisite well known types (WKT). Bumping rules_go to the latest version 0.18.4 (release notes) aligns with PGV which is on 0.18.3.

Risk Level: low (I think but there are WKT changes)
Testing: bazel test //test/...

Signed-off-by: Michael Payne <michael@sooper.org>

Mirrored from https://github.com/envoyproxy/envoy @ 7bf53149d137dcb2a7b4eddb4f8c23eda23d66e5

bazel/api_build_system.bzl

@@ -47,11 +47,11 @@ def api_go_proto_library(name, proto, deps = []):
         visibility = ["//visibility:public"],
         deps = deps + [
             "@com_github_gogo_protobuf//:gogo_proto_go",
-            "@com_github_golang_protobuf//ptypes/duration:go_default_library",
-            "@com_github_golang_protobuf//ptypes/struct:go_default_library",
-            "@com_github_golang_protobuf//ptypes/timestamp:go_default_library",
-            "@com_github_golang_protobuf//ptypes/wrappers:go_default_library",
-            "@com_github_golang_protobuf//ptypes/any:go_default_library",
+            "@io_bazel_rules_go//proto/wkt:any_go_proto",
+            "@io_bazel_rules_go//proto/wkt:duration_go_proto",
+            "@io_bazel_rules_go//proto/wkt:struct_go_proto",
+            "@io_bazel_rules_go//proto/wkt:timestamp_go_proto",
+            "@io_bazel_rules_go//proto/wkt:wrappers_go_proto",
             "@com_lyft_protoc_gen_validate//validate:go_default_library",
             "@googleapis//:rpc_status_go_proto",
         ],
@@ -65,10 +65,10 @@ def api_go_grpc_library(name, proto, deps = []):
         visibility = ["//visibility:public"],
         deps = deps + [
             "@com_github_gogo_protobuf//:gogo_proto_go",
-            "@com_github_golang_protobuf//ptypes/duration:go_default_library",
-            "@com_github_golang_protobuf//ptypes/struct:go_default_library",
-            "@com_github_golang_protobuf//ptypes/wrappers:go_default_library",
-            "@com_github_golang_protobuf//ptypes/any:go_default_library",
+            "@io_bazel_rules_go//proto/wkt:any_go_proto",
+            "@io_bazel_rules_go//proto/wkt:duration_go_proto",
+            "@io_bazel_rules_go//proto/wkt:struct_go_proto",
+            "@io_bazel_rules_go//proto/wkt:wrappers_go_proto",
             "@com_lyft_protoc_gen_validate//validate:go_default_library",
             "@googleapis//:http_api_go_proto",
         ],

bazel/repositories.bzl

@@ -180,7 +180,7 @@ go_proto_library(
     proto = ":rpc_status_protos_lib",
     visibility = ["//visibility:public"],
     deps = [
-      "@com_github_golang_protobuf//ptypes/any:go_default_library",
+      "@io_bazel_rules_go//proto/wkt:any_go_proto",
     ],
 )