message: Remove dependency on cord_test_helper and fix CMake build.
diff: -tink_module(aead_internal)
  +tink_module(aead::internal)
  tink_cc_library(
  NAME cord_aes_gcm_boringssl
  @@ -18,23 +18,3 @@ tink_cc_library(
  absl::strings
  absl::cord
  )
  -
  -
  -tink_cc_test(
  - NAME cord_aes_gcm_boringssl_test
  - SRCS cord_aes_gcm_boringssl_test.cc
  - DATA wycheproof::testvectors
  - DEPS
  - tink::subtle::aes_gcm_boringssl
  - tink::subtle::wycheproof_util
  - tink::aead::cord_aead
  - tink::util::secret_data
  - tink::util::status
  - tink::util::statusor
  - tink::util::test_util
  - tink::util::test_matchers
  - absl::strings
  - absl::cord
  - absl::cord_test_helpers
  - rapidjson
  -)
  