Move all "OCM"-Repos from Gardener to open-component-model organization

[In-Ko]

Description
Now that the official name has been approved, we could move all "ocm"-repositories we currently have under the Gardener Org to the new "open-component-model" org. Things to consider:

• The repos should also be renamed in that process, as the prefix "ocm" is not needed anymore in the new org
• This move will also affect our project board, as such projects are also created on org level. Unfortunately, I don't see a way to move them, so we might have to re-create the board in the new org
• I suggest we start with this only if all existing PRs in "ocm"-repos are merged.

Done Criteria

• All "ocm"-repos have been moved from the Gardener to the open-component-model org

[In-Ko]

All OCM-Repos have been moved to the new Org: https://github.com/orgs/open-component-model/repositories.

[In-Ko]

Open: Recreate the old Project Board (https://github.com/orgs/gardener/projects/21/views/2) in the new org.

[In-Ko]

Board created, and all issues assigned.