Currently in the archive_deleted_rows code, we will attempt to clean up
"residue" of deleted instance records by assuming any table with a
'instance_uuid' column represents data tied to an instance's lifecycle
and delete such records.
This behavior poses a problem in the case where an instance has a PCI
device allocated and someone deletes the instance. The 'instance_uuid'
column in the pci_devices table is used to track the allocation
association of a PCI with an instance. There is a small time window
during which the instance record has been deleted but the PCI device
has not yet been freed from a database record perspective as PCI
devices are freed during the _complete_deletion method in the compute
manager as part of the resource tracker update call.
Records in the pci_devices table are anyway not related to the
lifecycle of instances so they should not be considered residue to
clean up if an instance is deleted. This adds a condition to avoid
archiving pci_devices on the basis of an instance association.