Add IPMI Driver

[ep1cman]

Adds power control via IPMI interface (using ipmitool). It has been made generic enough to allow feature like Serial-over-LAN to be addded later as I do not have a device with this functionality to test against.

Checklist

• Documentation for the feature
• Tests for the feature

• The arguments and description in doc/configuration.rst have been updated

• Add a section on how to use the feature to doc/usage.rst

• Add a section on how to use the feature to doc/development.rst

• PR has been tested

• Man pages have been regenerated

[codecov]

Codecov Report

Attention: Patch coverage is 64.61538% with 23 lines in your changes missing coverage. Please review.

Project coverage is 56.2%. Comparing base (fff35ee) to head (a1730c5).

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
labgrid/driver/ipmi.py	62.5%	15 Missing ⚠️
labgrid/remote/exporter.py	50.0%	5 Missing ⚠️
labgrid/remote/client.py	0.0%	3 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff           @@
##           master   #1567   +/-   ##
======================================
  Coverage    56.2%   56.2%           
======================================
  Files         170     172    +2     
  Lines       13248   13312   +64     
======================================
+ Hits         7449    7491   +42     
- Misses       5799    5821   +22     

Flag	Coverage Δ
3.10	56.2% <64.6%> (+<0.1%)	⬆️
3.11	56.2% <64.6%> (+<0.1%)	⬆️
3.12	56.2% <64.6%> (+<0.1%)	⬆️
3.13	56.2% <64.6%> (+<0.1%)	⬆️
3.9	56.3% <64.6%> (+<0.1%)	⬆️

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