The LoadTests Go CoGBK Flink Batch job is flaky

[github-actions]

The LoadTests Go CoGBK Flink Batch is failing over 50% of the time
Please visit https://github.com/apache/beam/actions/workflows/beam_LoadTests_Go_CoGBK_Flink_batch.yml?query=is%3Afailure+branch%3Amaster to see the logs.

[github-actions]

Reopening since the workflow is still flaky