Option to disable OCI image build

[baijum]

Feature Request

Is your feature request related to a problem? Please describe.
I want to build operator binary without producing OCI image.

Describe the solution you'd like
Introduce a --without-image for operator-sdk build command to disable building OCI image.

[camilamacedo86]

Closing this on based on the discussion made in the #1600. Please, feel free to re-open if you wish or think that it is required.