[Feature] Provide a CLI utility to directly load a set of permissions and submit it to a remote instance

[fmigneault]

Is your feature request related to a problem? Please describe.

Following helpers can be used to update services, default user/groups and custom users:

• https://github.com/Ouranosinc/Magpie/blob/master/magpie/cli/register_providers.py
• https://github.com/Ouranosinc/Magpie/blob/master/magpie/cli/register_defaults.py
• https://github.com/Ouranosinc/Magpie/blob/master/magpie/cli/batch_update_users.py

However, there is no equivalent for updating permissions from a configuration file using the CLI.

Describe the solution you'd like

As explored in https://github.com/Ouranosinc/Magpie/pull/610 The operations from magpie.register.magpie_register_permissions_from_config can be used from a Python script using a Permissions Configuration corresponding to the format in https://github.com/Ouranosinc/Magpie/blob/master/config/permissions.cfg and a remote Magpie URL.

A CLI helper should be provided to allow doing this directly using the file without need to manually import the function and pass the loaded configuration.