distributedCache: allow local `dir://` and `container-storage://` as a cache transport

[flouthoc]

Allowing local directory as transport enables users to make distributed caching more flexible by making sure.

• Allows end users to move cache sources and destination manually.
• Allows storing cache on an NFS or various mount sources.
• Allows end users to distribute cache without registry setup.

[NO NEW TESTS NEEDED] [NO TESTS NEEDED] // Will add test in final commit

What type of PR is this?

/kind api-change /kind bug /kind cleanup /kind deprecation /kind design /kind documentation /kind failing-test /kind feature /kind flake /kind other

What this PR does / why we need it:

How to verify it

Which issue(s) this PR fixes:

Special notes for your reviewer:

Does this PR introduce a user-facing change?

distributedCache: allow local `dir://` and `container-storage://` as a cache transport

Closes: https://github.com/containers/buildah/issues/4875

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[rhatdan]

@nalind PTAL My concern here is you are breaking API.

[github-actions[bot]]

A friendly reminder that this PR had no activity for 30 days.

[rhatdan]

Is this a breaking change? @vrothberg @mtrmac PTAL

[github-actions[bot]]

A friendly reminder that this PR had no activity for 30 days.

[rhatdan]

Closing as this has not been touched in 6 months.