chore(aws-cdk-lib): add helm and kubectl to aws-cdk-lib NOTICE (#16606)

Both `helm` and `kubectl` are included in the `aws-cdk-lib` via the
`lambda-layer-kubectl` package. The notices for these packages is included in
the `lambda-layer-kubectl` NOTICE, but not the `aws-cdk-lib` NOTICE. This PR
fixes the omission.

fixes #16441

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

packages/aws-cdk-lib/NOTICE

@@ -806,4 +806,36 @@ The above copyright notice and this permission notice shall be included in all c
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
-----------------
+----------------
+
+** kubectl - https://github.com/kubernetes/kubectl
+Copyright 2017 The Kubernetes 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.
+
+----------------
+
+** helm - https://github.com/helm/helm
+Copyright 2016 The Kubernetes Authors All Rights Reserved
+
+   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.

packages/aws-cdk-lib/package.json

@@ -50,6 +50,10 @@
       "jsii/java",
       "jsii/python",
       "jsii/dotnet"
+    ],
+    "attribution": [
+      "kubectl",
+      "helm"
     ]
   },
   "jsii": {