fix(ipam): Include scope params in Prefix creation links

Update prefix creation URLs to pass `scope_type` and `scope` (replacing
the legacy `site` query parameter) for both the Child Prefixes
"Add Prefix" button and in-table available-prefix links.
Scope parameters are only rendered when a scope is defined, so
unscoped prefixes remain unchanged.

Fixes #21262

netbox/ipam/tables/template_code.py

@@ -6,7 +6,7 @@ PREFIX_LINK = """
 {% if record.pk %}
   <a href="{{ record.get_absolute_url }}" id="prefix_{{ record.pk }}">{{ record.prefix }}</a>
 {% else %}
-  <a href="{% url 'ipam:prefix_add' %}?prefix={{ record }}{% if object.vrf %}&vrf={{ object.vrf.pk }}{% endif %}{% if object.site %}&site={{ object.site.pk }}{% endif %}{% if object.tenant %}&tenant_group={{ object.tenant.group.pk }}&tenant={{ object.tenant.pk }}{% endif %}">{{ record.prefix }}</a>
+  <a href="{% url 'ipam:prefix_add' %}?prefix={{ record }}{% if object.vrf %}&vrf={{ object.vrf.pk }}{% endif %}{% if object.scope %}&scope_type={{ object.scope_type.pk }}&scope={{ object.scope.pk }}{% endif %}{% if object.tenant %}&tenant_group={{ object.tenant.group.pk }}&tenant={{ object.tenant.pk }}{% endif %}">{{ record.prefix }}</a>
 {% endif %}
 """
 

netbox/templates/ipam/prefix/prefixes.html

@@ -6,7 +6,7 @@
   {% include 'ipam/inc/max_depth.html' %}
   {% include 'ipam/inc/max_length.html' %}  
   {% if perms.ipam.add_prefix and first_available_prefix %}
-    <a href="{% url 'ipam:prefix_add' %}?prefix={{ first_available_prefix }}&vrf={{ object.vrf.pk }}&site={{ object.site.pk }}&tenant_group={{ object.tenant.group.pk }}&tenant={{ object.tenant.pk }}" class="btn btn-primary">
+    <a href="{% url 'ipam:prefix_add' %}?prefix={{ first_available_prefix }}{% if object.vrf %}&vrf={{ object.vrf.pk }}{% endif %}{% if object.scope %}&scope_type={{ object.scope_type.pk }}&scope={{ object.scope.pk }}{% endif %}{% if object.tenant %}&tenant_group={{ object.tenant.group.pk }}&tenant={{ object.tenant.pk }}{% endif %}" class="btn btn-primary">
       <i class="mdi mdi-plus-thick" aria-hidden="true"></i> {% trans "Add Prefix" %}
     </a>
   {% endif %}