Fixes #3668: use q to search when assigning IP

[hSaria]

Fixes: #3009

Fixes: #3668

Search by address (starting with), DNS name (icontains), or description (icontains) when assigning an IP address.

[hSaria]

Hold off on this for a bit.

[hSaria]

You can take a look now.

I resolved #3009 in here too. Usually I'd create a separate PR, but then I noticed that the q filter is perfect for both tickets (down to the exact fields' tests).

netbox/netbox/ipam/filters.py

Lines 353 to 359 in 92ec4bd

	def search(self, queryset, name, value):
	if not value.strip():
	return queryset
	qs_filter = (
	Q(dns_name__icontains=value) |
	Q(description__icontains=value) |
	Q(address__istartswith=value)