bazel: Add targets for cross-package testdata

channels/BUILD.bazel

@@ -0,0 +1,8 @@
+filegroup(
+    name = "channeldata",
+    srcs = [
+        "alpha",
+        "stable",
+    ],
+    visibility = ["//visibility:public"],
+)

cmd/kops/BUILD.bazel

@@ -126,6 +126,10 @@ go_test(
         "delete_confirm_test.go",
         "integration_test.go",
     ],
+    data = [
+        "//channels:channeldata",  # keep
+        "//tests/integration:exported_testdata",  # keep
+    ],
     library = ":go_default_library",
     deps = [
         "//cmd/kops/util:go_default_library",

tests/integration/BUILD.bazel

@@ -0,0 +1,5 @@
+filegroup(
+    name = "exported_testdata",
+    srcs = glob(["**"]),
+    visibility = ["//visibility:public"],
+)