Add registry support for dynamic stack updates [2/2]

[thepetk]

/kind user-story
/kind epic

Which area this user story is related to?

/area ci
/area registry

User Story

As a stack owner trying to create a new stack version, update an existing one or even introduce a new stack, I want to be able to see this change in the registry (e.g. the community registry) shortly after my PR is merged. This way, I don't have to wait for the new deployment of the devfile services team.

This user story focuses on the support of dynamic updates on stacks, like a creation/update of a stack version, or the creation of a new stack in general. Those updates should be available on the deployed registry shortly after the merge of each PR updating the stacks/ dir.

This is the second part of the EPIC. For the full description of the EPIC please take a look here

Acceptance Criteria

• Add support for dynamic routing to the registry-viewer #1510
• Implement the OCI registry update functionality #1511
• Implement post-merge github job for updated stacks #1513