OCPCLOUD-1194: Implement cloud-config-file flag in CCCMO render

[Danil-Grigorev]

Based on #56 and #48, both are required to merge before that.

Introduces a new flag:

Flags:
      --cloud-config-file string             Input path for the cloud config config map file generated by cluster-config-operator.

This implementation will unconditionally create a {destination_dir}/config directory which would be used as a source of files to copy into /etc/kubernetes/bootstrap-configs directory on bootstrap VM.

Based on the information from the Infrastructure resource provided from --cluster-infrastructure-file the --cloud-config-file configMap would be read, unpacked and stored into {destination_dir}/config/cloud.config. Each provider explicitly requiring this, would be able to mount /etc/kubernetes/bootstrap-configs directory, and read the content from cloud.conf. example is Azure CCM.

Implementation is copied from MCO which served as a mean to pass cloud config to master ignition file.

To test this PR on Azure, check out installer PR, and do:

cd <your-installer-dir>
./hack/build.sh
OPENSHIFT_INSTALL_RELEASE_IMAGE_OVERRIDE=quay.io/dgrigore/release:azure-bootstrap ./bin/openshift-install create cluster

[lobziik]

/lgtm

[Fedosin]

/approve
/hold

[elmiko]

mostly looks good, i just have a minor suggestion for the help text.

[Danil-Grigorev]

@elmiko Added your suggestion. PTAL
/hold cancel

[elmiko]

thanks @Danil-Grigorev !
/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: elmiko, Fedosin

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[openshift-bot]

/retest

Please review the full test history for this PR and help us cut down flakes.

[openshift-ci]

@Danil-Grigorev: The following test failed, say /retest to rerun all failed tests:

Test name	Commit	Details	Rerun command
ci/prow/e2e-aws-ccm	8ad771f	link	/test e2e-aws-ccm

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[openshift-bot]

/retest

Please review the full test history for this PR and help us cut down flakes.