feat(k8s/application): add/edit placement preferences/constraints (#4210)

* feat(k8s/application): create application with placement preferences/constraints

* feat(k8s/application): edit application placement preferences/constraints

app/kubernetes/pod/payloads/affinities.js

@@ -0,0 +1,29 @@
+export function KubernetesPodNodeAffinityPayload() {
+  return {
+    requiredDuringSchedulingIgnoredDuringExecution: {
+      nodeSelectorTerms: [], // []KubernetesNodeSelectorTermPayload
+    },
+    preferredDuringSchedulingIgnoredDuringExecution: [], // []KubernetesPreferredSchedulingTermPayload
+  };
+}
+
+export function KubernetesPreferredSchedulingTermPayload() {
+  return {
+    weight: 1,
+    preference: {}, // KubernetesNodeSelectorTermPayload
+  };
+}
+
+export function KubernetesNodeSelectorTermPayload() {
+  return {
+    matchExpressions: [], // []KubernetesNodeSelectorRequirementPayload
+  };
+}
+
+export function KubernetesNodeSelectorRequirementPayload() {
+  return {
+    key: '', // string
+    operator: '', // KubernetesPodNodeAffinityNodeSelectorRequirementOperators
+    values: [], // []string
+  };
+}