CORS-3063: Support control plane disk encryption

[rna-afk]

Adding disk encryption set to control plane machines if provided by the user to encrypt the disk.

[jhixson74]

This should probably also set the security profile in the machine spec for encryption at host.

[rna-afk]

@jhixson74 I think I did it here or do I need to add it somewhere else?
https://github.com/rna-afk/installer/blob/a6f102c8ea23f4a4c826b26ad909fc30e4e31f6d/pkg/asset/machines/azure/azuremachines.go#L93

[openshift-ci-robot]

@rna-afk: This pull request references CORS-3063 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the story to target the "4.16.0" version, but no target version was set.

In response to this:

Adding disk encryption set to control plane machines if provided by the user to encrypt the disk.

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[jhixson74]

/lgtm
/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jhixson74

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[openshift-ci]

@rna-afk: The following tests 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/e2e-azure-ovn-shared-vpc	8bd01f9	link	false	/test e2e-azure-ovn-shared-vpc
ci/prow/e2e-azurestack	8bd01f9	link	false	/test e2e-azurestack

Full PR test history. Your PR dashboard.

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