allow kube app to scale 0 (#10909)

app/react/kubernetes/applications/components/ReplicationFormSection/ReplicationFormSection.tsx

@@ -34,12 +34,12 @@ export function ReplicationFormSection({
       <FormControl label="Instance count" required>
         <Input
           type="number"
-          min="1"
+          min="0"
           max="9999"
           value={values.replicaCount}
           disabled={!supportScalableReplicaDeployment}
           onChange={(e) =>
-            onChange({ replicaCount: e.target.valueAsNumber || 1 })
+            onChange({ replicaCount: e.target.valueAsNumber || 0 })
           }
           className="w-1/4"
           data-cy="k8sAppCreate-replicaCountInput"

app/react/kubernetes/applications/components/ReplicationFormSection/replicationValidation.ts

@@ -20,7 +20,7 @@ export function replicationValidation(
   } = validationData || {};
   return object({
     replicaCount: number()
-      .min(1, 'Instance count must be greater than 0.')
+      .min(0, 'Instance count must be greater than or equal to 0.')
       .test(
         'overflow',
         'This application would exceed available resources. Please review resource reservations or the instance count.',