As a user I can re-upload artifacts if the file has gone missing or corrupted

[pulpbot]

Author: @ipanova (ipanova@redhat.com)

Redmine Issue: 7790, https://pulp.plan.io/issues/7790

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If an artifact has gone missing or corrupted(bit rot) there is no way to re-upload it back to the filesystem

1. push an image with 'podman push'
2. rm /var/lib/pulp/artifacts/<some_artifact> or corrupt it
3. push same image with 'podman push'
4. file is still missing/corrupted

Same stands for the oci image builder feature

While we have /repair/ endpoint it will not work for these operations since there is not remoteartifact.

[lubosmj]

Closing in favour of #1288. Manifests will be artifactless in the future.