Add makemigrations flag that just uses timestamp

[Andrew Chen Wang]

Currently, when running makemigrations, a verbose name is used instead of an auto_timestamp name when the verbose name is 47 characters or less in length. I would like to add an option to force the autogeneration of the name to use the timestamp or the verbose name, regardless of the rule.

[Mariusz Felisiak]

Thanks for the ticket, however, I don't think we need another option for the makemigrations command. This seems quite niche and currently achievable without a new option e.g.

$ python manage.py makemigrations my_app --name="auto_`date +%Y%m%d_%H%M`"
Migrations for 'my_app':
  test_one/migrations/0005_auto_20230127_1255.py