Save/Restore condition transition time for control plane

[gibizer]

This is needed as we are resetting the condition state of each reconcile
but the changing lastTransitionTime field causes reconcile loops.

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[fmount]

/lgtm

[fmount]

Even with this patch I still see looping in my local test. I'll try a clean environment but I'm not sure it will change the current behavior

[openshift-ci]

@gibizer: 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/openstack-operator-build-deploy-kuttl	cd32840	link	true	/test openstack-operator-build-deploy-kuttl

Full PR test history. Your PR dashboard.

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[dprince]

@gibizer as discussed yesterday. Here is my PR with all the observedGeneration and savedConditions work: #751

[gibizer]

abandoned in favor of #751