Improvement: Provide harmonic `--config=` options for the different host/target combinations

### What

We support multiple platforms, but not all can be set with `--config=` and not all of them follow a common pattern.
This ticket is about providing such configs.

### How

_No response_

### Estimates for realization

_No response_

### Category

- [ ] Affects Detailed Design

### Requirements / Architecture

- [x] Requirements / Architecture are not affected by this change?

Start by locating the existing --config= handling and the configuration entry points for each host/target platform combination. Compare which combinations are currently supported and define done as providing a consistent --config= pattern for all required combinations.

Written by the indexing model from the issue text.