oob_ips & primary_ip's are deleted when a device is deleted

[ITJamie]

NetBox version

v3.6.3

Python version

3.10

Steps to Reproduce

1. create a device
2. assign an IP to two interfaces
3. assign an IP to both oob_ip and primary_ip
4. delete device
5. look at changelog, the ips will have been deleted,

Expected Behavior

the ips should become unassigned from the device, not deleted

ref: #6015 - here deleting of ips when interfaces were deleted was disabled

Observed Behavior

oob_ip/primary_ip assigned addresses are deleted.
this is unexpected as the field models have on_delete=models.SET_NULL configured

[ITJamie]

device before deletion:

changelog showing deleted ips:

I noticed this when working on #13690. there the deletion modal I adjusted was showing oob_ip's and primary_ips were up for deletion...

I may have my logic backwards here when it comes to the on_delete=models.SET_NULL direction. However I still consider it surprising that primary_ip's or oob_ip's would be deleted on deletion of a device