Update boskos resource type and state for s390x

Changed boskos resource type from 'powervs' to 'vpc-service' in janitor and reaper configs. Updated resource state from 'dirty' to 'free' in boskos-resources-configmap for k8s-s390x-test-vpc.

Signed-off-by: Sudharshan Muralidharan <sudharshan.muralidharan1@ibm.com>

Author: sudharshanibm

kubernetes/ibm-s390x/prow/boskos-janitor.yaml

@@ -20,7 +20,7 @@ spec:
           image: gcr.io/k8s-staging-boskos/ibmcloud-janitor-boskos:v20250922-14f95fc
           args:
             - --boskos-url=http://boskos.test-pods.svc.cluster.local.
-            - --resource-type=powervs
+            - --resource-type=vpc-service
             - --ignore-api-key=true
             - --account-id=efa47ec6fd45473a9e1fd6b7b8363f5c
           env:

kubernetes/ibm-s390x/prow/boskos-reaper.yaml

@@ -20,4 +20,4 @@ spec:
           image: gcr.io/k8s-staging-boskos/reaper:v20250922-14f95fc
           args:
             - --boskos-url=http://boskos.test-pods.svc.cluster.local.
-            - --resource-type=powervs
+            - --resource-type=vpc-service

kubernetes/ibm-s390x/prow/boskos-resources-configmap.yaml

@@ -4,7 +4,7 @@ data:
     resources:
     - names:
       - k8s-s390x-test-vpc
-      state: dirty
+      state: free
       type: vpc-service
 kind: ConfigMap
 metadata: