doc: update year in hack/boilerplate.go.txt to 2022

This commit updates year to 2022 in hack/boilerplate.go.txt
and regenerates api/v1alpha1/zz_genereated.deepcopy.go with
updated year.

Signed-off-by: Rakshith R <rar@redhat.com>

Author: Rakshith-R

api/v1alpha1/zz_generated.deepcopy.go

@@ -1,5 +1,5 @@
 /*
-Copyright 2021 The Kubernetes-CSI-Addons Authors.
+Copyright 2022 The Kubernetes-CSI-Addons Authors.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.