message: [XLA] Mark iota_test as optonly, iota_test_cpu takes forever in fastbuild
diff: @@ -2135,6 +2135,8 @@ xla_test(
  shard_count = 30,
  tags = [
  "enable_for_xla_interpreter",
  + # Require optimized builds, iota_test_cpu is very slow in fastbuild.
  + "optonly",
  ],
  deps = [
  ":client_library_test_base",
  