Fix Dockerfile for newest directory layout

[dibi-codes]

What type of PR is this?
/kind bug

What this PR does / why we need it:
The playbooks have been recently moved from the repoistory root into the playbooks folder. But are missing from the docker-image. Furthermore the ansible.cfg and the plugins are missing as well.

Does this PR introduce a user-facing change?:

Fix Dockerfile for newest directory layout

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: dabeck / name: Daniel Strufe (777b5c4, ddfac0d)

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[k8s-ci-robot]

Hi @dabeck. Thanks for your PR.

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[yankay]

/ok-to-test

[MrFreezeex]

Thanks! looks good to me, could you rebase your PR to rekick the pipeline though?

[oomichi]

looks good for me, thanks for your contribution!

/approve

[MrFreezeex]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dabeck, MrFreezeex, oomichi

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