fix: add missing Apache 2.0 boilerplate headers

Files added in the k/k 1.35 rebase were missing the required
Apache 2.0 license boilerplate headers, causing verify-boilerplate
CI check to fail.

Signed-off-by: mjudeikis-bot <mjudeikis-bot@faros.sh>
Co-authored-by: Mangirdas Judeikis <mangirdas@judeikis.lt>

Author: mjudeikis-bot

hack/bump-k8s.sh

@@ -1,4 +1,18 @@
 #!/usr/bin/env bash
+# Copyright 2024 The KCP 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
+#
+#     http://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.
+
 
 #!/bin/sh
 set -euo pipefail
@@ -19,4 +33,4 @@ for MOD in "${MODS[@]}"; do
     )
     go mod edit "-replace=${MOD}=${MOD}@${V}"
 done
-go get "k8s.io/kubernetes@v${VERSION}"
+go get "k8s.io/kubernetes@v${VERSION}"

server/batteries/battery.go

@@ -1,3 +1,19 @@
+/*
+Copyright 2024 The KCP 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
+
+    http://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 batteries
 
 import (

server/readiness/ready.go

@@ -1,3 +1,19 @@
+/*
+Copyright 2024 The KCP 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
+
+    http://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 readiness
 
 import (

server/tokengetter/tokengetter.go

@@ -1,3 +1,19 @@
+/*
+Copyright 2024 The KCP 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
+
+    http://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 tokengetter
 
 import (