Summary:
Fix the core dump file generation pattern to be the same as generated from our ansible playbooks.
https://github.com/yugabyte/yugabyte-db/blob/master/managed/devops/roles/provision-cluster-server/tasks/main.yml#L119

Test Plan: iTest pipeline

Reviewers: anijhawan

Reviewed By: anijhawan

Differential Revision: https://phorge.dev.yugabyte.com/D42920