Werk #13119: Interface checks: Do not use discovered state and speed in cluster mode

The interface checks compare the current state and speed of the interfaces to the values which were found during the discovery phase (unless the user explicitly configured a different behavior). However, in cluster mode, this comparison is not useful because the discovered values correspond to a single interface, whereas the the current values correspond to potentially multiple interfaces. Therefore, with this werk, this comparison is removed.

Note that, as before, users still have the option to explicitly set the expected state and speed, also in cluster mode.

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