Update python dateutil

[LucasArmandVast]

Bad python-dateutils version was causing issues in the cloud copy --scheduled command.

(.venv) bstg@VAST-LAX-3B92X64:~/workspace/vast-cli$ ./vast.py cloud copy --src /workspace/A --dst /instance --instance 29270745 --connection 34972 --transfer "Instance To Cloud" --schedule HOURLY --day "*" --hour "*"
copying /workspace/A /instance 29270745 34972 Instance To Cloud
Internet upload cost is $9.333333333333334 per TB. Are you sure you want to schedule a cloud backup? (y/n): y
Traceback (most recent call last):
  File "/home/bstg/workspace/vast-cli/./vast.py", line 7976, in <module>
    main()
  File "/home/bstg/workspace/vast-cli/./vast.py", line 7952, in main
    res = args.func(args)
          ^^^^^^^^^^^^^^^
  File "/home/bstg/workspace/vast-cli/./vast.py", line 1771, in cloud__copy
    add_scheduled_job(args, req_json, cli_command, api_endpoint, "POST", instance_id=args.instance, contract_end_date=contract_end_date)
  File "/home/bstg/workspace/vast-cli/./vast.py", line 1878, in add_scheduled_job
    start_timestamp, end_timestamp = convert_dates_to_timestamps(args)
                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/bstg/workspace/vast-cli/./vast.py", line 6123, in convert_dates_to_timestamps
    start_date = dateutil.parser.parse(str(args.start_date))
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/bstg/workspace/vast-cli/.venv/lib/python3.12/site-packages/dateutil/parser.py", line 1182, in parse
    return DEFAULTPARSER.parse(timestr, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/bstg/workspace/vast-cli/.venv/lib/python3.12/site-packages/dateutil/parser.py", line 587, in parse
    if (isinstance(tzinfos, collections.Callable) or
                            ^^^^^^^^^^^^^^^^^^^^
AttributeError: module 'collections' has no attribute 'Callable'

Evidence of fix:

(.venv) bstg@VAST-LAX-3B92X64:~/workspace/vast-cli$ python3 -m pip show python-dateutil
Name: python-dateutil
Version: 2.9.0.post0
Summary: Extensions to the standard Python datetime module
Home-page: https://github.com/dateutil/dateutil
Author: Gustavo Niemeyer
Author-email: [email protected]
License: Dual License
Location: /home/bstg/workspace/vast-cli/.venv/lib/python3.12/site-packages
Requires: six
Required-by: vastai
(.venv) bstg@VAST-LAX-3B92X64:~/workspace/vast-cli$ ./vast.py cloud copy --src /workspace/A --dst /instance --instance 29270745 --connection 34972 --transfer "Instance To Cloud" --schedule HOURLY --day "*" --hour "*"
copying /workspace/A /instance 29270745 34972 Instance To Cloud
Internet upload cost is $9.333333333333334 per TB. Are you sure you want to schedule a cloud backup? (y/n): y
Existing scheduled job found. Do you want to update it (y|n)? y
add_scheduled_job update: success - Scheduling HOURLY job to cloud copy from 2025-12-27 UTC to 2026-02-28 UTC
{'success': True, 'scheduled_job_id': 5, 'msg': 'Successfully updated scheduled job with ID 5'}