Don't record metadata about Athena data if the cluster identifier doesn't specify it.
Don't record metadata about Athena data if the cluster identifier doesn't specify it.

PiperOrigin-RevId: 335926651

GoogleCloudPlatform/PerfKitBenchmarker,GoogleCloudPlatform/PerfKitBenchmarker,GoogleCloudPlatform/PerfKitBenchmarker,GoogleCloudPlatform/PerfKitBenchmarker