NO-JIRA: UPSTREAM: 4700: Ignition: add option to store User Data in plain text

[damdo]

Carrying 4700 PR that just merged in CAPA upstream until it is released in 2.4.0 and we can downstream it through a proper rebase.

[openshift-ci-robot]

@damdo: This pull request explicitly references no jira issue.

In response to this:

Carrying 4700 PR that just merged in CAPA upstream until it is released in 2.4.0 and we can downstream it through a proper rebase.

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[openshift-ci]

@damdo: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/unit	3ad90a6	link	true	/test unit

Full PR test history. Your PR dashboard.

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[damdo]

/close in favour of a direct downstream rebase