Merge changes Ibb8c134b,I9dcea5be,Ic88538d9 into stable-3.5

* changes:
  bazel: Bump to latest 4.x release: 4.2.4
  bazel: Move auto-value dep to external_plugin_deps.bzl
  Add python3 support

.bazelrc

diff --git a/.bazelrc b/.bazelrc
index 3ae03ff..f9248ea 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -1,2 +1,2 @@
-build --workspace_status_command="python ./tools/workspace_status.py"
+build --workspace_status_command="python3 ./tools/workspace_status.py"
 test --build_tests_only

.bazelversion

diff --git a/.bazelversion b/.bazelversion
index fcdb2e1..cf78d5b 100644
--- a/.bazelversion
+++ b/.bazelversion
@@ -1 +1 @@
-4.0.0
+4.2.4

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index 5e4b7ea..66ad7d0 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -8,7 +8,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "a52e3f381e2fe2a53f7641150ff723171a2dda1e",
+    commit = "cd9b114339913aad2c9981e387fd151123f40a44",
     #local_path = "/home/<user>/projects/bazlets",
 )
 
@@ -29,22 +29,6 @@
     yarn_lock = "//:yarn.lock",
 )
 
-load("//tools/bzl:maven_jar.bzl", "maven_jar")
-
-AUTO_VALUE_VERSION = "1.7.4"
-
-maven_jar(
-    name = "auto-value",
-    artifact = "com.google.auto.value:auto-value:" + AUTO_VALUE_VERSION,
-    sha1 = "6b126cb218af768339e4d6e95a9b0ae41f74e73d",
-)
-
-maven_jar(
-    name = "auto-value-annotations",
-    artifact = "com.google.auto.value:auto-value-annotations:" + AUTO_VALUE_VERSION,
-    sha1 = "eff48ed53995db2dadf0456426cc1f8700136f86",
-)
-
 # Load plugin API
 load(
     "@com_googlesource_gerrit_bazlets//:gerrit_api.bzl",
@@ -53,3 +37,7 @@
 
 # Release Plugin API
 gerrit_api()
+
+load("//:external_plugin_deps.bzl", "external_plugin_deps")
+
+external_plugin_deps()

external_plugin_deps.bzl

diff --git a/external_plugin_deps.bzl b/external_plugin_deps.bzl
new file mode 100644
index 0000000..fdf9c1c
--- /dev/null
+++ b/external_plugin_deps.bzl
@@ -0,0 +1,16 @@
+load("@bazel_tools//tools/build_defs/repo:maven_rules.bzl", "maven_jar")
+
+def external_plugin_deps():
+    AUTO_VALUE_VERSION = "1.7.4"
+
+    maven_jar(
+        name = "auto-value",
+        artifact = "com.google.auto.value:auto-value:" + AUTO_VALUE_VERSION,
+        sha1 = "6b126cb218af768339e4d6e95a9b0ae41f74e73d",
+    )
+
+    maven_jar(
+        name = "auto-value-annotations",
+        artifact = "com.google.auto.value:auto-value-annotations:" + AUTO_VALUE_VERSION,
+        sha1 = "eff48ed53995db2dadf0456426cc1f8700136f86",
+    )

tools/workspace_status.py

diff --git a/tools/workspace_status.py b/tools/workspace_status.py
index d948424..fb5ec6d 100644
--- a/tools/workspace_status.py
+++ b/tools/workspace_status.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # This script will be run by bazel when the build process starts to
 # generate key-value information that represents the status of the