implement k8s credential selection in the new patternfly UI

awx/ui_next/src/api/models/CredentialTypes.js

@@ -7,7 +7,7 @@ class CredentialTypes extends Base {
   }
 
   async loadAllTypes(
-    acceptableKinds = ['machine', 'cloud', 'net', 'ssh', 'vault']
+    acceptableKinds = ['machine', 'cloud', 'net', 'ssh', 'vault', 'kubernetes']
   ) {
     const pageSize = 200;
     // The number of credential types a user can have is unlimited. In practice, it is unlikely for