Support sub commands for properties of a complicated resource

[kairu-ms]

Why do you need this feature?

Some resources are complicated. For example DataCollectionRuleResource

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

Currently Code Gen can generate commands in resource level:

    with self.command_group('monitor data-collection rule', monitor_control_service_data_collection_rule,
                            client_factory=cf_data_collection_rule) as g:
        g.custom_show_command('show', 'monitor_data_collection_rule_show')
        g.custom_command('delete', 'monitor_data_collection_rule_delete', confirmation=True)
        g.custom_command('list', 'data_collection_rules_list')
        g.custom_command('create', 'data_collection_rules_create')
        g.custom_command('update', 'data_collection_rules_update')

However we need to support generate commands for property level to operate complicated property of a resource:

    with self.command_group('monitor data-collection rule data-flow', monitor_control_service_data_collection_rule,
                            client_factory=cf_data_collection_rule) as g:
        g.custom_show_command(
            'list', 'data_collection_rules_data_flows_list')
        g.custom_command(
            'add', 'data_collection_rules_data_flows_add')

Describe the solution you'd like

Describe alternatives you've considered

Additional context