More helm-v3 support

• Secret values support for werf helm-v3 subcommands.

Cleanup

• [cleanup] Cleanup meta images
  • Reject lazy scanning: check each policy references even it is not needed
  • Keep a minimum number of commit hashes in stages storage preserving only the latest commit for each content signature in each policy references
• [tests] Cleanup Suite: init stages storage docker registry options.
• [tests] Cleanup Suite: meta images cleanup

Docs

• [docs] Add new publication: "Werf: Fully customizable GitOps"

Installation

Linux amd64

Darwin amd64

Windows amd64