Use the Hypervisor CRD instead of labels.

[fwiesel]

When there is no maintenance-contoller profile the GardenerLifecycleController will now set the hypervisor cro maintenance field. For confirmation, it will look on the conditions.
That renders the labels obsolete.

[fwiesel]

Based on #213

[github-actions]

Merging this branch will increase overall coverage

Impacted Packages	Coverage Δ	🤖
github.com/cobaltcore-dev/openstack-hypervisor-operator/cmd	0.00% (ø)
github.com/cobaltcore-dev/openstack-hypervisor-operator/internal/controller	54.32% (+4.70%)	👍

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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/cmd/main.go	0.00% (ø)	0	0	0
github.com/cobaltcore-dev/openstack-hypervisor-operator/internal/controller/gardener_node_lifecycle_controller.go	72.58% (+59.02%)	62 (+3)	45 (+37)	17 (-34)	🌟
github.com/cobaltcore-dev/openstack-hypervisor-operator/internal/controller/node_eviction_label_controller.go	0.00% (-40.54%)	0 (-74)	0 (-30)	0 (-44)	💀 💀 💀 💀
github.com/cobaltcore-dev/openstack-hypervisor-operator/internal/controller/utils.go	82.61% (+10.06%)	46 (-5)	38 (+1)	8 (-6)	🎉

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