Updates group management:

- **Centralized Group Definition:** Instead of creating groups within
migration files, which can be cumbersome to maintain, group definitions
are now managed through the AbstractRoles model. These roles are
synchronized using the `python manage.py sync_roles` command. This
ensures no existing groups or their associated permissions are deleted.

- **Module Renaming**: The `hypha.apply.users.groups` module has been
renamed to `hypha.apply.users.roles` to reflect the shift from
group-based to role-based permissions. This aligns with upcoming changes
utilizing the `rolepermissions` module.

- **Streamlined Group Descriptions**: The GroupDesc model is removed.
Instead, help text can be directly defined within the role itself. This
simplifies management and allows for translation of group descriptions.

**This is the first of a series of pull requests aimed at refactoring
the permissions system.**

As a sample implementation, converts the delete submission to use this
role-permissions. See:
https://github.com/HyphaApp/hypha/pull/4151/commits/8239c2172ab9150cdba0db8d95f13e1681f176cd

## Test Steps

 - make sure the migrations run fine.
- groups are create correctly via `python manage.py sync_roles`, it
should also keep the existing groups.
 -  groups description is rendered in the admin.
 - ensure delete submission/application is working as expected