Bazel CI flaky test failure com.google.devtools.build.lib.server.GrpcServerTest testInterruptStream

https://buildkite.com/organizations/bazel/analytics/suites/bazel-bazel/tests/01880a58-5233-71f5-bd0f-793736b8bac0?branch=master#flaky

Found in list of Post-submit CI Builds :  [https://buildkite.com/organizations/bazel/analytics/suites/bazel-bazel/tests/01880a58-5233-71f5-bd0f-793736b8bac0?branch=master#failed](https://buildkite.com/organizations/bazel/analytics/suites/bazel-bazel/tests/01880a39-672a-75de-b7f4-e14060369f53?branch=master#failed)

Logs:

```
FLAKY: com.google.devtools.build.lib.server.GrpcServerTest testInterruptStream
```

CC Greenteam [@fweikert](https://github.com/fweikert)

Start with the linked Buildkite flaky-test report and the com.google.devtools.build.lib.server.GrpcServerTest testInterruptStream entry point. Reproduce or inspect the failure logs, then identify and stabilize the flaky test; done means the test no longer intermittently fails in post-submit CI.

Written by the indexing model from the issue text.