add watch logic for addondeployment

[coleenquadros]

https://issues.redhat.com/browse/RHOBS-949
https://issues.redhat.com/browse/ACM-8312

From what I understand is that the placement controller has no logic to watch over the changes to addondeployment config. So any update to it will not be picked up by managerclusteraddon and clustermanagementaddon which are watched already but they only hold a ref to addondeploymentconfig and not the actual config.

The PR adds the watch logic in the placement controller to monitor changes in addondeployment config and sets up the request to reconcile and also apply change to all managed clusters

[douglascamata]

@coleenquadros there's an e2e test failing. Can you have a look, please?

[coleenquadros]

/test test-unit

[coleenquadros]

/retest

[douglascamata]

Looks good to me. Would love to achieve that 70% test coverage that SonarCloud is asking for though. It's fine if it's not feasible because we can't add 100% coverage of the proxy scenarios.

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: coleenquadros, douglascamata

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[openshift-ci]

New changes are detected. LGTM label has been removed.

[coleenquadros]

/test test-unit

[sonarqubecloud]

Quality Gate failed

Failed conditions

47.6% Coverage on New Code (required ≥ 70%)

See analysis details on SonarCloud

[openshift-ci]

@coleenquadros: 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	842a2fb	link	true	/test sonarcloud

Full PR test history. Your PR dashboard.

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[coleenquadros]

@subbarao-meduri Testing working as expected on QA test bed - changed the proxy setting values in addondeploymentconfig and the placement controller reconciled to pick up the new proxy settings