Should get_available_modes be influenced by inference

If we know through mode inference, that a certain state or mode of a (sub-)system can't be transitioned to, should `get_available_states` and `get_available_modes` of (sub-)systems report accordingly?

Example:
* Subsystem A contains several nodes, e.g., node B
* If node B transitions into `error_processing`, certain states and modes for subsystem A are not available until errors in node B are fixed
* `get_available_states` and `get_available_modes` of subsystem A only report states and modes that allow node B to be in error_processing, e.g., degraded modes

Start by reading the get_available_states and get_available_modes entry points alongside the mode-inference behavior described in the example. Determine whether inferred unreachable states and modes should be filtered for parent subsystems, including the error_processing case. Done requires a settled design decision and corresponding verified behavior.

Written by the indexing model from the issue text.