Permissions: Validate against Team/User permission role update (#29101)

* validate against role field update

* lowercase error string

* make all msgs consistent style

* fix wording

Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com>

* sayonara simple json

Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com>

pkg/api/utils.go

@@ -0,0 +1,9 @@
+package api
+
+import "encoding/json"
+
+func jsonMap(data []byte) (map[string]string, error) {
+	jsonMap := make(map[string]string)
+	err := json.Unmarshal(data, &jsonMap)
+	return jsonMap, err
+}