When only one taxonomy of specific type is defined, api should default to that taxonomy
that way, e.g. when creating a new object without specifying organization it will be assigned to the default organization if that is the only one, when searching the list will default to the only organization etc.
Fixes #26092 - Assign taxonomy in api when only one present
When only one taxonomy of a certain type is present, we can
automatically assign it to created resources instead of requiring the
user to specify them. This is especially useful for resources created by
the installer such as smart proxies that will be assigned to the default
location and organization.