Creates a protoc release zip (#9188)

* Creates a protoc release zip

Mimics what we're doing manually today but powered by Bazel.

* don't special case this.

* Addressing feedback.

* adding comment about _cc_toolchain

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index e500967..8104dcc 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -56,3 +56,6 @@
 load("@bazel_skylib//:workspace.bzl", "bazel_skylib_workspace")
 
 bazel_skylib_workspace()
+
+load("@rules_pkg//:deps.bzl", "rules_pkg_dependencies")
+rules_pkg_dependencies()