Implement CRD logic for SCC registration offline

[cnotv]

Description

Extend current online registration to handle also the offline scenario.

Implementation

As defined by @mallardduck the operation required are:

• create the secret with just mode: offline as the data,
• Wait for controller to create the Registration which will create the offline request secret with hardcoded name offline-request-<HASH_VALUE>
• At this point the download offline request button can work,
• When user uploads the Cert, that can be added to the entrypoint secret and hopefully it will validate.

[richard-cox]

@cnotv can you make sure there are matching 2.13.0 issues for all 2.12.1 issues?

[cnotv]

I am thinking to push back to 2.12.0 at this point since we did not branch it yet and feature is almost done.

[yonasberhe23]

Requires manual validation.

[cnotv]

Nothing against but for the records it has already unit tests for download and register.