Add session token to EKS cluster form

Since we are using temporary AWS credentials, we need to
pass a session token as well as the usual access key ID
and secret.

app/assets/javascripts/create_cluster/eks_cluster/index.js

@@ -14,6 +14,7 @@ export default el => {
     createRoleArnHelpPath,
     accessKeyId,
     secretAccessKey,
+    sessionToken,
     externalId,
     accountId,
     hasCredentials,
@@ -41,6 +42,7 @@ export default el => {
       awsCredentials: {
         accessKeyId,
         secretAccessKey,
+        sessionToken,
       },
     }),
     components: {