08-interop/task03: Just use premade binary

[MrKevinWeiss]

I think my git tracking messed up so this is not based on my branch... Anyways it just ran locally and worked.

$ tox -e test -- -k "spec08 and task03"
=============================================== test session starts ===============================================
platform linux -- Python 3.10.12, pytest-7.3.2, pluggy-1.4.0 -- /home/weiss/repos/Release-Specs/.tox/test/bin/python
cachedir: .tox/test/.pytest_cache
rootdir: /home/weiss/repos/Release-Specs
configfile: setup.cfg
plugins: cov-5.0.0, rerunfailures-14.0
collected 136 items / 135 deselected / 1 selected                                                                 

08-interop/test_spec08.py::test_task03[nodes0] PASSED                                                       [100%]

----------------------- generated xml file: /home/weiss/repos/Release-Specs/test-report.xml -----------------------
================================== 1 passed, 135 deselected in 80.25s (0:01:20) ===================================
  test: OK (81.09=setup[0.05]+cmd[81.04] seconds)
  congratulations :) (81.15 seconds)

[MrKevinWeiss]

https://github.com/RIOT-OS/RIOT/actions/runs/8738833552

[Teufelchen1]

Linter ist not happy

[mguetschow]

After #309 has been merged, the pylint CI should pass now after a rebase. @MrKevinWeiss do you want me to pick this up?

[mguetschow]

Alright, thanks for explaining! LGTM then :)