message: Add special fake kms targets to be used by pybind.
diff: @@ -314,8 +314,33 @@ cc_library(
  ],
  )
  +# This should only be used by tink/python/tink/cc/pybind,
  +# where we need this target without the testonly flag.
  +cc_library(
  + name = "fake_kms_client_pybind",
  + srcs = ["fake_kms_client.cc"],
  + hdrs = ["fake_kms_client.h"],
  + include_prefix = "tink/util",
  + visibility = ["//visibility:public"],
  + deps = [
  + ":errors",
  + ":status",
  + ":statusor",
  + "//:aead",
  + "//:binary_keyset_reader",
  + "//:binary_keyset_writer",
  + "//:cleartext_keyset_handle",
  + "//:keyset_handle",
  + "//:kms_client",
  + "//:kms_clients",
  + "//aead:aead_key_templates",
  + "@com_google_absl//absl/strings",
  + ],
  +)
  +
  cc_library(
  name = "fake_kms_client",
  + testonly = 1,
  srcs = ["fake_kms_client.cc"],
  hdrs = ["fake_kms_client.h"],
  include_prefix = "tink/util",
  