Convert go_binary linkstamp to x_defs

cmd/kubectl/BUILD

@@ -5,6 +5,7 @@ load(
     "go_binary",
     "go_library",
 )
+load("//pkg/version:def.bzl", "version_x_defs")
 
 go_binary(
     name = "kubectl",
@@ -15,11 +16,11 @@ go_binary(
         "-static",
     ],
     library = ":go_default_library",
-    linkstamp = "k8s.io/kubernetes/pkg/version",
     tags = ["automanaged"],
     visibility = [
         "//build/visible_to:COMMON_release",
     ],
+    x_defs = version_x_defs(),
 )
 
 go_library(