Merge pull request #40167 from spxtr/verify-boiler

Automatic merge from submit-queue (batch tested with PRs 39772, 39831, 39481, 40167, 40149)

Add //hack:verify-boilerplate rule.

This pattern is working well in test-infra. I'll add the gofmt and go vet rules next.

hack/BUILD

@@ -19,3 +19,18 @@ filegroup(
     ],
     tags = ["automanaged"],
 )
+
+sh_test(
+    name = "verify-boilerplate",
+    srcs = ["verify-boilerplate.sh"],
+    data = ["//:all-srcs"],
+    tags = ["manual"],
+)
+
+test_suite(
+    name = "verify-all",
+    tags = ["manual"],
+    tests = [
+        "verify-boilerplate",
+    ],
+)