Add Apache License information to start.go

Added licensing information to the start.go file.

Signed-off-by: Rahul Naskar <143400898+rahul810050@users.noreply.github.com>

Author: rahul810050

cmd/operator/controller/start.go

@@ -1,5 +1,17 @@
-/* (full file — same as provided earlier; ensures the new flag is present and wired).
-   Paste the exact content below into cmd/operator/controller/start.go
+/*
+Copyright 2024 The Kubeflow authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    https://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
 */
 
 package controller