Handle Karpenter nodes without nodepool

[Kavinraja-G]

Describe the bug
When the nodes are provisioned without any nodepool, in this case karpenter for example, all nodes are shown under a single AZ without taking account of the actual zones.

Reproduce steps

1. Spin up nodes using Karpenter
2. kubectl nodegizmo nodepool

Expected behavior
Nodes should seperated based on AZs though if there is no nodepool associated.

Screenshots

❯ k nodegizmo nodepool
NODEPOOL                          	PROVIDER	REGION   	ZONE      	INSTANCE-TYPE	NODES
Unknown                           	Unknown 	us-east-1	us-east-1a	t3a.small    	ip-10-0-0-93.ec2.internal
                                  	        	         	          	             	ip-10-0-10-158.ec2.internal
                                  	        	         	          	             	ip-10-0-11-132.ec2.internal
                                  	        	         	          	             	ip-10-0-14-108.ec2.internal
                                  	        	         	          	             	ip-10-0-19-158.ec2.internal
                                  	        	         	          	             	ip-10-0-22-210.ec2.internal
                                  	        	         	          	             	ip-10-0-24-21.ec2.internal
                                  	        	         	          	             	ip-10-0-30-193.ec2.internal
                                  	        	         	          	             	ip-10-0-31-180.ec2.internal
                                  	        	         	          	             	ip-10-0-32-151.ec2.internal
                                  	        	         	          	             	ip-10-0-32-179.ec2.internal
                                  	        	         	          	             	ip-10-0-33-207.ec2.internal
                                  	        	         	          	             	ip-10-0-37-144.ec2.internal
                                  	        	         	          	             	ip-10-0-37-55.ec2.internal
                                  	        	         	          	             	ip-10-0-38-99.ec2.internal
                                  	        	         	          	             	ip-10-0-4-128.ec2.internal
                                  	        	         	          	             	ip-10-0-4-53.ec2.internal
                                  	        	         	          	             	ip-10-0-40-105.ec2.internal
                                  	        	         	          	             	ip-10-0-40-11.ec2.internal
                                  	        	         	          	             	ip-10-0-41-98.ec2.internal
                                  	        	         	          	             	ip-10-0-42-88.ec2.internal
                                  	        	         	          	             	ip-10-0-46-105.ec2.internal
generic-2023102107344574640000001e	EKS     	us-east-1	us-east-1b	t3.medium    	ip-10-0-23-172.ec2.internal
                                  	        	         	          	             	ip-10-0-33-54.ec2.internal
                                  	        	         	          	             	ip-10-0-7-138.ec2.internal