process: add reference HW information to verification plan

[aschemmel-tech]

This fixes an Audit finding:
" It needs to be clarified where the reference system is located physically (affecting e.g. access rights)."
and shall be documented here:
https://eclipse-score.github.io/score/main/platform_management_plan/software_verification.html#reference-hardware-interaction-with-infrastructure

[pahmann]

Should be integrated in the dummy chapter as part of verification plan:

score/docs/platform_management_plan/software_verification.rst

Line 428 in ac715ff

Reference hardware interaction with infrastructure