MGMT-17270: Add PreflightValidationOCP v1beta2

[qbarrand]

Make PreflightValidationOCP objects aware of Module namespaces to avoid cross-namespace collisions.
Add PreflightValidationOCP v1beta2 to restructure its status struct.
Add a conversion webhook for PreflightValidationOCP v1beta1 --> v1beta2.
Move the code updating the PreflightValidationOCP status from internal/statusupdater to internal/preflight to avoid a dependency cycle.
Update reconciler, libraries and unit tests.

[openshift-ci-robot]

@qbarrand: This pull request references MGMT-17270 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 task to target the "4.16.0" version, but no target version was set.

In response to this:

Make PreflightValidationOCP objects aware of Module namespaces to avoid cross-namespace collisions.
Add PreflightValidationOCP v1beta2 to restructure its status struct.
Add a conversion webhook for PreflightValidationOCP v1beta1 --> v1beta2.
Move the code updating the PreflightValidationOCP status from internal/statusupdater to internal/preflight to avoid a dependency cycle.
Update reconciler, libraries and unit tests.

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[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

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[qbarrand]

Will be rebased after #1049 is merged.

[yevgeny-shnaidman]

/lgtm