ACM-11757: refactor status update management to avoid flapping status

[thibaultmg]

This PR changes how the addon status reporting is managed, based on this specification.

It first implements a status package that enables atomic update of each component's status by adding two specific condition types in the addon conditions list: MetricsCollector and UwlMetricsCollector.
This package is used by the endpoint operator to set the UpdateSuccessful or UpdateFailed reasons (plus some others), and by the metrics collector to set the ForwardSuccessful or ForwardFailed reasons for each collector.

In order to avoid the flapping behavior described in the linked issue, it forbids some transitions such as UpdateFailed -> ForwardXxx. The idea is that to report a consistent status, the collector must first be in the state required by the endpoint operator.

These specific condition types are then aggregated by the status controller into the expected condition types by ACM (Available, Degraded and Progressing).

One edge case that is not handled here is if the collector pod stops after having set the reason to ForwardSuccessful. In such a case, we get an Available status while it is not working. We could add more logic, requiring the collector to do regular updates on its condition timestamp and the controller would monitor this. Let's keep it simple while nobody complains about it 😄

[openshift-ci]

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[philipgough]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: philipgough, thibaultmg

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[openshift-ci]

New changes are detected. LGTM label has been removed.

[sonarcloud]

Quality Gate failed

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[openshift-ci]

@thibaultmg: 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/sonarcloud	9645628	link	false	/test sonarcloud

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