Fix failing "beam_PostCommit_XVR_GoUsingJava_Dataflow" job

[andreydevyatkin]

What happened?

The following job has been failing for a long time:

• https://github.com/apache/beam/actions/workflows/beam_PostCommit_XVR_GoUsingJava_Dataflow.yml

[lostluck]

Since we haven't fixed this since moving it to Actions, moving this to P2, and not treating it as a release blocker for now.