chore: add testcases for k8s packages

[liangyuanpeng]

releated:

• K8s 1.33 #287 (comment)

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[liangyuanpeng]

	error[E2G22]: TypeError
	  --> /home/runner/work/modules/modules/k8s/1.32/api/networking/v1/ingress_backend.k:22:16
	   |
	22 |     resource?: v1.TypedLocalObjectReference
	   |                ^ attribute 'TypedLocalObjectReference' not found in 'module 'k8s.apimachinery.pkg.apis.meta.v1''
	   |
	
	 [recovered]
	panic: 
	error[E2L23]: CompileError
	 --> /home/runner/work/modules/modules/k8s/1.32/api/networking/v1/ingress_backend.k:6:1
	  |
	6 | import api.core.v1
	  | ^ the name 'v1' is defined multiple times, 'v1' must be defined only once
	  |
	
	
	error[E2G22]: TypeError
	  --> /home/runner/work/modules/modules/k8s/1.32/api/networking/v1/ingress_backend.k:22:16
	   |
	22 |     resource?: v1.TypedLocalObjectReference
	   |                ^ attribute 'TypedLocalObjectReference' not found in 'module 'k8s.apimachinery.pkg.apis.meta.v1''

it's happenning on kcl-go v1.11.1,and i think change import api.core.v1 to import api.core.v1 corev1 can fix it. I will update it on tomorrow or next week.