Wait for eviction condition when offboarding and match eviction trigger

[fwiesel]

It doesn't make sense to poll openstack for the hypervisors, when we are still evicting, so wait for that.

We have to match the condition to trigger the eviction and waiting on the eviction.

[github-actions]

Merging this branch will decrease overall coverage

Impacted Packages	Coverage Δ	🤖
github.com/cobaltcore-dev/openstack-hypervisor-operator/internal/controller	55.44% (-0.07%)	👎

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Coverage by file

Changed files (no unit tests)

Changed File	Coverage Δ	Total	Covered	Missed	🤖
github.com/cobaltcore-dev/openstack-hypervisor-operator/internal/controller/decomission_controller.go	53.73% (-0.96%)	67 (+3)	36 (+1)	31 (+2)	👎
github.com/cobaltcore-dev/openstack-hypervisor-operator/internal/controller/hypervisor_maintenance_controller.go	71.60% (ø)	81	58	23

Please note that the "Total", "Covered", and "Missed" counts above refer to code statements instead of lines of code. The value in brackets refers to the test coverage of that file in the old version of the code.

Changed unit test files

• github.com/cobaltcore-dev/openstack-hypervisor-operator/internal/controller/decomission_controller_test.go