feat: ensure LV/HV on for all electrical tests

Short description

This will ensure the LV and HV are powered on. HV will not be checked for digital modules and for measurements with the --no-bias option provided. This also migrates more common code out into a single utility.

More detailed description

Checklist

• add tests
• label this MR
• assign reviewers
• update documentation and changelog
• link related issues and close with this MR via "closes #"