Skip RedisClusterSpec conversion for sentinel and standalone mode

[Neaj-Morshad-101]

if out.Cluster == nil {
			out.Cluster = &RedisClusterSpec{}
}
if err := Convert_v1_RedisClusterSpec_To_v1alpha2_RedisClusterSpec(in.Cluster, out.Cluster, s); err != nil {
			return err
}


func Convert_v1_RedisClusterSpec_To_v1alpha2_RedisClusterSpec(in *v1.RedisClusterSpec, out *RedisClusterSpec, s conversion.Scope) error {
	if in.Shards != nil { // HERE in IS NIL IF MODE IS NOT CLUSTER. THAT'S WHY PANIC.... 
		out.Master = (*int32)(unsafe.Pointer(in.Shards))
	} else {
		out.Master = nil
	}
}