Fix and keep api reponse log in the slurmlog dir

[annshress]

Error: ref

An error was encountered while running hook 'notify_api_completion'
Traceback (most recent call last):
  File "/data/home/svc_hpchedwig_dev/image_portal_workflows/.venv/lib/python3.13/site-packages/prefect/flow_engine.py", line 1137, in call_hooks
    await result
  File "/data/home/svc_hpchedwig_dev/image_portal_workflows/em_workflows/utils/utils.py", line 631, in notify_api_completion
    hooks_log = open(f"slurm-log/{flowrun_id}-notify-api-completion.txt", "w")
FileNotFoundError: [Errno 2] No such file or directory: 'slurm-log/ee885056-3e50-4a77-8e6b-8143f5f5dd4f-notify-api-completion.txt'