consolidate and de-duplicate local-test make targets

[blu-nitro]

As described in #2 this simplifies local test make targets.

[robin-nitrokey]

LGTM. One additional request: Sometimes the development device is in a state where it is not recognized by nitropy nk3 status. Nevertheless I’d like to be able to trigger the test. So can you please add a target without the auto-detection where I can set MODEL to select the model?

[blu-nitro]

Sometimes the development device is in a state where it is not recognized by nitropy nk3 status. Nevertheless I’d like to be able to trigger the test. So can you please add a target without the auto-detection where I can set MODEL to select the model?

Now it detects whether you manually set the MODEL and if so it skips the automatic detection all in the same target. All this conditional execution is not very nice in make, but it works. We could also just have two separate make targets as you described, but i thought this way was simpler from user perspective.