Add kuttl binary

[gberche-orange]

As a bosh cli user,

• in order to get fast feedback for tests running with kuttl
• I need an installation of kuttl cli
• with completion: see kubectl kuttl completion bash -h

https://kuttl.dev/docs/cli.html#installation https://github.com/kudobuilder/kuttl/releases

[ogrand]

Integrated with latest commit