Update internal dependencies to modern versions. Bazel Federation repo is deprecated. (#327)

See https://github.com/bazelbuild/bazel-federation/pull/127

In particular, this allows us to use a modern Stardoc release to fix generated md docs.

And we can remove internal_deps.bzl/internal_setup.bzl - it's unnecessary complexity
needed only for deprecated Federation setup.

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index e8e042e..00f86ab 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,12 +3,47 @@
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")
 
-http_archive(
-    name = "rules_pkg",
-    sha256 = "352c090cc3d3f9a6b4e676cf42a6047c16824959b438895a76c2989c6d7c246a",
+maybe(
+    name = "io_bazel_rules_go",
+    repo_rule = http_archive,
+    sha256 = "2b1641428dff9018f9e85c0384f03ec6c10660d935b750e3fa1492a281a53b0f",
     urls = [
-        "https://github.com/bazelbuild/rules_pkg/releases/download/0.2.5/rules_pkg-0.2.5.tar.gz",
-        "https://mirror.bazel.build/github.com/bazelbuild/rules_pkg/releases/download/0.2.5/rules_pkg-0.2.5.tar.gz",
+        "https://mirror.bazel.build/github.com/bazelbuild/rules_go/releases/download/v0.29.0/rules_go-v0.29.0.zip",
+        "https://github.com/bazelbuild/rules_go/releases/download/v0.29.0/rules_go-v0.29.0.zip",
+    ],
+)
+
+load("@io_bazel_rules_go//go:deps.bzl", "go_register_toolchains", "go_rules_dependencies")
+
+go_rules_dependencies()
+
+go_register_toolchains(version = "1.17.1")
+
+# Below this line is for documentation generation only,
+# and should thus not be included by dependencies on
+# bazel-skylib.
+
+maybe(
+    http_archive,
+    name = "io_bazel_stardoc",
+    sha256 = "c9794dcc8026a30ff67cf7cf91ebe245ca294b20b071845d12c192afe243ad72",
+    urls = [
+        "https://mirror.bazel.build/github.com/bazelbuild/stardoc/releases/download/0.5.0/stardoc-0.5.0.tar.gz",
+        "https://github.com/bazelbuild/stardoc/releases/download/0.5.0/stardoc-0.5.0.tar.gz",
+    ],
+)
+
+load("@io_bazel_stardoc//:setup.bzl", "stardoc_repositories")
+
+stardoc_repositories()
+
+maybe(
+    http_archive,
+    name = "rules_pkg",
+    sha256 = "a89e203d3cf264e564fcb96b6e06dd70bc0557356eb48400ce4b5d97c2c3720d",
+    urls = [
+        "https://mirror.bazel.build/github.com/bazelbuild/rules_pkg/releases/download/0.5.1/rules_pkg-0.5.1.tar.gz",
+        "https://github.com/bazelbuild/rules_pkg/releases/download/0.5.1/rules_pkg-0.5.1.tar.gz",
     ],
 )
 
@@ -17,59 +52,29 @@
 rules_pkg_dependencies()
 
 maybe(
-    name = "bazel_federation",
-    repo_rule = http_archive,
-    sha256 = "b10529fcf8a464591e845588348533981e948315b706183481e0d076afe2fa3c",
-    url = "https://github.com/bazelbuild/bazel-federation/releases/download/0.0.2/bazel_federation-0.0.2.tar.gz",
-)
-
-load("@bazel_federation//:repositories.bzl", "bazel_skylib_deps", "rules_go")
-
-bazel_skylib_deps()
-
-rules_go()
-
-load("@bazel_federation//setup:bazel_skylib.bzl", "bazel_skylib_setup")
-
-bazel_skylib_setup()
-
-load("@bazel_federation//setup:rules_go.bzl", "rules_go_setup")
-
-rules_go_setup()
-
-# Below this line is for documentation generation only,
-# and should thus not be included by dependencies on
-# bazel-skylib.
-
-load("//:internal_deps.bzl", "bazel_skylib_internal_deps")
-
-bazel_skylib_internal_deps()
-
-load("//:internal_setup.bzl", "bazel_skylib_internal_setup")
-
-bazel_skylib_internal_setup()
-
-maybe(
     name = "rules_cc",
     repo_rule = http_archive,
-    sha256 = "b4b2a2078bdb7b8328d843e8de07d7c13c80e6c89e86a09d6c4b424cfd1aaa19",
-    strip_prefix = "rules_cc-cb2dfba6746bfa3c3705185981f3109f0ae1b893",
+    sha256 = "4dccbfd22c0def164c8f47458bd50e0c7148f3d92002cdb459c2a96a68498241",
     urls = [
-        "https://mirror.bazel.build/github.com/bazelbuild/rules_cc/archive/cb2dfba6746bfa3c3705185981f3109f0ae1b893.zip",
-        "https://github.com/bazelbuild/rules_cc/archive/cb2dfba6746bfa3c3705185981f3109f0ae1b893.zip",
+        "https://mirror.bazel.build/github.com/bazelbuild/rules_cc/releases/download/0.0.1/rules_cc-0.0.1.tar.gz",
+        "https://github.com/bazelbuild/rules_cc/releases/download/0.0.1/rules_cc-0.0.1.tar.gz",
     ],
 )
 
+load("//lib:unittest.bzl", "register_unittest_toolchains")
+
+register_unittest_toolchains()
+
 # Provide a repository hint for Gazelle to inform it that the go package
 # github.com/bazelbuild/rules_go is available from io_bazel_rules_go and it
 # doesn't need to duplicatively fetch it.
 # gazelle:repository go_repository name=io_bazel_rules_go importpath=github.com/bazelbuild/rules_go
 http_archive(
     name = "bazel_gazelle",
-    sha256 = "bfd86b3cbe855d6c16c6fce60d76bd51f5c8dbc9cfcaef7a2bb5c1aafd0710e8",
+    sha256 = "de69a09dc70417580aabf20a28619bb3ef60d038470c7cf8442fafcf627c21cb",
     urls = [
-        "https://mirror.bazel.build/github.com/bazelbuild/bazel-gazelle/releases/download/v0.21.0/bazel-gazelle-v0.21.0.tar.gz",
-        "https://github.com/bazelbuild/bazel-gazelle/releases/download/v0.21.0/bazel-gazelle-v0.21.0.tar.gz",
+        "https://mirror.bazel.build/github.com/bazelbuild/bazel-gazelle/releases/download/v0.24.0/bazel-gazelle-v0.24.0.tar.gz",
+        "https://github.com/bazelbuild/bazel-gazelle/releases/download/v0.24.0/bazel-gazelle-v0.24.0.tar.gz",
     ],
 )
 # Another Gazelle repository hint.