DELETE Tenant - Foreign Key Constraint

[satkunas]

Describe the bug
DELETE /api/v1/tenant/:produces foreign key constraint error in person table

To Reproduce
Steps to reproduce the behavior:

1. Create a new Tenant
2. Delete new tenant
3. Inspect packetfence.log
4. See error

Additional context

Apr 21 09:36:29 packetfence packetfence: pfperl-api(2813) ERROR: Database query failed with non retryable error: Cannot delete or update a parent row: a foreign key constraint fails (`pf`.`person`, CONSTRAINT `person_tenant_id` FOREIGN KEY (`tenant_id`) REFERENCES `tenant` (`id`)) (errno: 1451) [DELETE FROM `tenant` WHERE ( `tenant`.`id` = ? )]{2} (pf::dal::db_execute)

[nqb]

Perl unit tests failed: https://gitlab.com/inverse-inc/packetfence/-/jobs/1201417909#L559.

Related to #6239

[jrouzierinverse]

What should be the expected behavior when you attempt to remove a tenant that still has resource tied to it?

[extrafu]

@satkunas Hide the button for now. We'll handle that cleanly later.

[extrafu]

For now - if no data is tied to a tenant, we delete it. If there is, we disable it.