(v2) Ensure MachineAPI is enabled before trying to use its resources

[clobrano]

Why we need this PR

Currently, NHC only checks if it runs on OCP before trying to access MachineAPI resources, however not all OCP clusters have MachineAPI enabled.

Changes made

• Introduce a new Capabilities object that encapsulate two informations:
  • isOpenshift: which tells whether the cluster is OCP or not (this
  • information was already available in a different form)
  • hasMachineAPI: which tells whether the cluster has MachineAPI

HasMachineAPI detection

• for OCP v4.14+, it verifies the Cluster's enabled capabilities
• for previous versions, it checks if the machine.openshift.io Group exists

Which issue(s) this PR fixes

https://issues.redhat.com/browse/ECOPROJECT-1902

[openshift-ci[bot]]

Skipping CI for Draft Pull Request. If you want CI signal for your change, please convert it to an actual PR. You can still manually trigger a test run with /test all

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: clobrano

The full list of commands accepted by this bot can be found here.

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/medik8s/node-healthcheck-operator/blob/main/OWNERS)~~ [clobrano] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[clobrano]

/test 4.12-openshift-e2e

[clobrano]

/test 4.13-openshift-e2e

[clobrano]

need to double check something, no need to review it yet

[clobrano]

Ok, it should be good now :)

[slintes]

🤞🏼

/test 4.13-openshift-e2e

[clobrano]

/test 4.13-openshift-e2e

[clobrano]

/test 4.15-openshift-e2e

[mshitrit]

/lgtm

[clobrano]

/retest

[clobrano]

merging manually as tide has some problems at the moment