delete artifacts from store

[CamrynCarter]

Please check below, if the PR fulfills these requirements:

• Commit(s) and code follow the repositories guidelines.
• Test(s) have been added or updated to support these change(s).
• Doc(s) have been added or updated to support these change(s).

Associated Links:

• [feature] Allow hauler to delete artifacts from the store #202

Types of Changes:

• Feature - delete artifacts from hauler store

Proposed Changes:

• Simple string match on object reference that loops through store and removes any matching objects.

Verification/Testing of Changes:

• hauler store add nginx:latest
• hauler store info
• hauler store delete-artifact nginx:latest
• hauler store info

Additional Context:

[CamrynCarter]

biggest concern on clean up is properly parsing mediatype as part of the switch within the CleanUp function but this seems to have solved the errors I was seeing where blobs within manifests weren't being marked as referenced

UPDATE: fixed logic here so all layers are processed, should be ok now

[amartin120]

@CamrynCarter this seems to work well. You're awesome! My only current feedback is that it took me a few tries to realize that I wasn't supposed to include the registry as part of the ref. I feel like a common workflow would be to do a hauler store info first so that I could copy the ref for pasting to the delete command and everything shows up there with the origin registry included.

[amartin120]

This still makes me a little nervous but everything looks good. I appreciate this, thanks.