[core 3.70 compat] Django storages config deprecation

[pedro-psb]

Action for django's storages deprecation:

1. Pre or on core-3.70 compat declaration:
   • Replace legacy with new
   • Settings on signal-handler
2. On core 3.70 compat declaration: (closes this)
   • Use new setting in one CI scenario

See for context:
https://discourse.pulpproject.org/t/action-required-plugins-should-use-djangos-new-storage-config-for-3-70/1866

[netsandbox]

@mdellweg just a hint: pulp core 3.70.0 was released last week and the Docker image build fails because of the ansible plugin version constraint:

pulp_ansible/pyproject.toml

Line 32 in 84a3271

"pulpcore>=3.49.0,<3.70",

[mdellweg]

Yep, I released it and that's expected for a so called "breaking change release". I fear pulp_ansible is just the first in line (alphabethically) to fail the builds. We are in the process of producing compatibility releases for all the plugins.