File access issues for non-root users for Cloud Filestore

Summary: File access issues for non-root users for Cloud Filestore Description: We are experiencing an issue with Cloud Filestore Enterprise and High Scale tiers. Our engineering team continues to investigate the issue. We will provide an update by Sunday, 2023-02-26 01:30 US/Pacific with current details. We apologize to all who are affected by the disruption. Diagnosis: Non-root users may observe "Operation not permitted" access denied while accessing the files with the access is only granted via group permissions. Workaround: 1. Change the file owner to match the user accessing the file. 2. Alternatively, access the file as the superuser (root user). 3. Contact support to initiate rollback of the affected instance, with a potential instance downtime