fix tests by declaring testdata

pkg/kubectl/cmd/set/BUILD

@@ -37,6 +37,9 @@ go_library(
 go_test(
     name = "go_default_test",
     srcs = ["set_image_test.go"],
+    data = [
+        "//examples:config",
+    ],
     library = "go_default_library",
     tags = ["automanaged"],
     deps = [