Content-Type fixes in client4.ts and remote_cluster.go (#27887)

Co-authored-by: Mattermost Build <build@mattermost.com>
Co-authored-by: Miguel de la Cruz <miguel@mcrx.me>

server/channels/api4/remote_cluster.go

@@ -539,7 +539,9 @@ func generateRemoteClusterInvite(c *Context, w http.ResponseWriter, r *http.Requ
 	}
 
 	w.WriteHeader(http.StatusCreated)
-	w.Write([]byte(inviteCode))
+	if err := json.NewEncoder(w).Encode(inviteCode); err != nil {
+		c.Logger.Warn("Error while writing response", mlog.Err(err))
+	}
 }
 
 func getRemoteCluster(c *Context, w http.ResponseWriter, r *http.Request) {
@@ -663,5 +665,5 @@ func deleteRemoteCluster(c *Context, w http.ResponseWriter, r *http.Request) {
 	}
 
 	auditRec.Success()
-	w.WriteHeader(http.StatusNoContent)
+	ReturnStatusOK(w)
 }

server/channels/api4/remote_cluster_test.go

@@ -605,7 +605,7 @@ func TestDeleteRemoteCluster(t *testing.T) {
 		require.Zero(t, initialRC.DeleteAt)
 
 		resp, err := th.SystemAdminClient.DeleteRemoteCluster(context.Background(), rc.RemoteId)
-		CheckNoContentStatus(t, resp)
+		CheckOKStatus(t, resp)
 		require.NoError(t, err)
 
 		deletedRC, appErr := th.App.GetRemoteCluster(rc.RemoteId)