[addon-operator] fix nil, add error handling, fix logger

[ldmonster]

Overview

After we return nil helm module, we must not to use render (because of nil).
Added new error and handle it, where it needs

Inside touched files:
Add errors wrapping
Replace global logger with local logger

What this PR does / why we need it

Special notes for your reviewer

[miklezzzz]

a good catch, though I would do something with double error checking around RunHelmInstall, looks pretty ugly :(