Migrate TraitsController to SSA status updates

[fwiesel]

Replace PatchHypervisorStatusWithRetry with Status().Apply() for ConditionTypeTraitsUpdated and the Traits slice. Error paths pass the current hv.Status.Traits to retain ownership and avoid SSA releasing it on transient placement API failures.

Seed only ConditionTypeTraitsUpdated so SSA does not claim ownership over conditions written by other controllers.

Depends on #335 (ssa-conditions-helpers).

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[fwiesel]

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⚠️ Note: Baseline coverage from ssa-conditions-helpers branch is not available (artifact may be expired). Showing current coverage for changed files only.

Merging this branch will increase overall coverage

Impacted Packages	Coverage Δ	🤖
github.com/cobaltcore-dev/openstack-hypervisor-operator/internal/controller	69.02% (+69.02%)	🌟

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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/traits_controller.go	75.41% (+75.41%)	61 (+61)	46 (+46)	15 (+15)	🌟

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.