Add the ability to specify K8S/OCP credentials on a Job Template

see: https://github.com/ansible/awx/issues/5735

awx/ui/client/lib/components/tag/_index.less

@@ -67,6 +67,10 @@
     &--external:before {
         content: '\f14c'
     }
+
+    &--kubernetes_bearer_token:before {
+        content: '\f0c2';
+    }
 }
 
 .TagComponent-button {

awx/ui/client/src/templates/job_templates/multi-credential/multi-credential-modal.directive.js

@@ -111,7 +111,7 @@ function multiCredentialModalController(GetBasePath, qs, MultiCredentialService)
 
         scope.credentialTypes.forEach((credentialType => {
             if(credentialType.kind
-                .match(/^(machine|cloud|net|ssh|vault)$/)) {
+                .match(/^(machine|cloud|net|ssh|vault|kubernetes)$/)) {
                     scope.displayedCredentialTypes.push(credentialType);
             }
         }));