Builders are getting stuck on go install

[tnozicka]

 + go install golang.org/x/vuln/cmd/govulncheck@latest
go: downloading golang.org/x/vuln v1.1.3
go: downloading golang.org/x/telemetry v0.0.0-20240522233618-39ace7a40ae7
go: downloading golang.org/x/mod v0.19.0
go: downloading golang.org/x/tools v0.23.0
go: downloading golang.org/x/sync v0.7.0
{"component":"entrypoint","file":"sigs.k8s.io/prow/pkg/entrypoint/run.go:169","func":"sigs.k8s.io/prow/pkg/entrypoint.Options.ExecuteProcess","level":"error","msg":"Process did not finish before 4h0m0s timeout","severity":"error","time":"2024-09-12T12:28:29Z"}
{"component":"entrypoint","file":"sigs.k8s.io/prow/pkg/entrypoint/run.go:267","func":"sigs.k8s.io/prow/pkg/entrypoint.gracefullyTerminate","level":"error","msg":"Process did not exit before 15m0s grace period","severity":"error","time":"2024-09-12T12:43:29Z"} 

https://prow.scylla-operator.scylladb.com/view/gs/scylla-operator-prow/logs/post-scylla-operator-images-master-images/1834147040985092096#1:build-log.txt%3A1676

This has happened quite often and without any obvious cause.