Core: File descriptor of ray job does not get closed

[ujjawal-khare-27]

What happened + What you expected to happen

File descriptor does not get closed in the job manager process on this line when long running job cluster keep receiving job. https://github.com/ray-project/ray/blob/e164d87a49f8b5c7bc5778859873d75845705b47/python/ray/dashboard/modules/job/job_manager.py#L91 leading to high cpu usage

Versions / Dependencies

Ray 2.34 Python 3.11

Reproduction script

Ray jobs on a cluster with some fixed interval (e.g: 30 seconds)

Issue Severity

High: It blocks me from completing my task.