Update container-storage-interface/spec vendor to v0.3.0 (and related dependencies)

vendor/github.com/container-storage-interface/spec/lib/go/csi/v0/BUILD

@@ -1,27 +0,0 @@
-load("@io_bazel_rules_go//go:def.bzl", "go_library")
-
-go_library(
-    name = "go_default_library",
-    srcs = ["csi.pb.go"],
-    importpath = "github.com/container-storage-interface/spec/lib/go/csi/v0",
-    visibility = ["//visibility:public"],
-    deps = [
-        "//vendor/github.com/golang/protobuf/proto:go_default_library",
-        "//vendor/golang.org/x/net/context:go_default_library",
-        "//vendor/google.golang.org/grpc:go_default_library",
-    ],
-)
-
-filegroup(
-    name = "package-srcs",
-    srcs = glob(["**"]),
-    tags = ["automanaged"],
-    visibility = ["//visibility:private"],
-)
-
-filegroup(
-    name = "all-srcs",
-    srcs = [":package-srcs"],
-    tags = ["automanaged"],
-    visibility = ["//visibility:public"],
-)