refactor(app): placement form section [EE-6386] (#10818)

Co-authored-by: testa113 <testa113>

app/react/kubernetes/applications/components/PlacementFormSection/placementValidation.ts

@@ -0,0 +1,16 @@
+import { SchemaOf, array, boolean, mixed, object, string } from 'yup';
+
+import { PlacementsFormValues } from './types';
+
+export function placementsValidation(): SchemaOf<PlacementsFormValues> {
+  return object({
+    placementType: mixed().oneOf(['mandatory', 'preferred']).required(),
+    placements: array(
+      object({
+        label: string().required('Node label is required.'),
+        value: string().required('Node value is required.'),
+        needsDeletion: boolean(),
+      }).required()
+    ),
+  });
+}